Evaluation of Anatomic Variations in Maxillary Sinus with the Aid of Cone Beam Computed Tomography (CBCT) in a Population in South of Iran
Identifieur interne : 000671 ( Pmc/Corpus ); précédent : 000670; suivant : 000672Evaluation of Anatomic Variations in Maxillary Sinus with the Aid of Cone Beam Computed Tomography (CBCT) in a Population in South of Iran
Auteurs : Shoaleh Shahidi ; Barbad Zamiri ; Shahla Momeni Danaei ; Setareh Salehi ; Shahram HamedaniSource :
- Journal of Dentistry [ 2345-6485 ] ; 2016.
Abstract
Anatomic variations of the maxillary sinus can be detected in cone-beam computed tomography (CBCT) and may assist to locate the posterior superior alveolar artery (PSAA) and define the maxillary sinus morphology more accurately for a more strict surgical treatment plan.
The study aimed to determine normal variations of the maxillary sinus with the aid of CBCT in a sample population in south of Iran.
This cross-sectional prevalence study was based on evaluation of 198 projection data of CBCT scans of some Iranian patients aged 18-45 who referred to a private oral and maxillofacial radiology center in Shiraz from 2011 to 2013. CBCT scans were taken and analyzed with NewTom VGi device and software. The anatomic variations which were evaluated in the axial images included the presence of alveolar pneumatization, anterior pneumatization, exostosis, and hypoplasia. Moreover the location and height of sinus septa, and the location of PSAA were assessed. SPSS software (version 17.0) was used to analyze the data.
In a total of 396 examined sinuses, maxillary sinus alveolar pneumatization was the most common anatomic variation detected. Anterior pneumatization was detected in 96 sinuses (24.2%). Antral septa were found in 180 sinuses (45.4%) and were mostly located in the anterior region. Meanwhile, PSAA was mostly detected intra-osseous in 242 sinuses (65.7%).
Anatomic variations of the maxillary sinus were common findings in CBCT of the maxilla. Preoperative imaging with CBCT seems to be very helpful for assessing the location of PSAA and the maxillary sinus morphology, which may be used to adjust the surgical treatment plan to yield more successful treatments.
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PubMed: 26966702
PubMed Central: 4771057
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Evaluation of Anatomic Variations in Maxillary Sinus with the Aid of Cone Beam Computed Tomography (CBCT) in a Population in South of Iran</title><author><name sortKey="Shahidi, Shoaleh" sort="Shahidi, Shoaleh" uniqKey="Shahidi S" first="Shoaleh" last="Shahidi">Shoaleh Shahidi</name><affiliation><nlm:aff id="aff1"> Biomaterials Research Center, Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Zamiri, Barbad" sort="Zamiri, Barbad" uniqKey="Zamiri B" first="Barbad" last="Zamiri">Barbad Zamiri</name><affiliation><nlm:aff id="aff2"> Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Momeni Danaei, Shahla" sort="Momeni Danaei, Shahla" uniqKey="Momeni Danaei S" first="Shahla" last="Momeni Danaei">Shahla Momeni Danaei</name><affiliation><nlm:aff id="aff3"> Orthodontics Research Center, Dept. of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Salehi, Setareh" sort="Salehi, Setareh" uniqKey="Salehi S" first="Setareh" last="Salehi">Setareh Salehi</name><affiliation><nlm:aff id="aff4"> Undergraduate Student, Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Hamedani, Shahram" sort="Hamedani, Shahram" uniqKey="Hamedani S" first="Shahram" last="Hamedani">Shahram Hamedani</name><affiliation><nlm:aff id="aff5"> Dental Research Development Center, School of Dentistry, Shiraz University of Medical Sciences, Private Practice, Shiraz, Iran.</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26966702</idno><idno type="pmc">4771057</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4771057</idno><idno type="RBID">PMC:4771057</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000671</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000671</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Evaluation of Anatomic Variations in Maxillary Sinus with the Aid of Cone Beam Computed Tomography (CBCT) in a Population in South of Iran</title><author><name sortKey="Shahidi, Shoaleh" sort="Shahidi, Shoaleh" uniqKey="Shahidi S" first="Shoaleh" last="Shahidi">Shoaleh Shahidi</name><affiliation><nlm:aff id="aff1"> Biomaterials Research Center, Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Zamiri, Barbad" sort="Zamiri, Barbad" uniqKey="Zamiri B" first="Barbad" last="Zamiri">Barbad Zamiri</name><affiliation><nlm:aff id="aff2"> Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Momeni Danaei, Shahla" sort="Momeni Danaei, Shahla" uniqKey="Momeni Danaei S" first="Shahla" last="Momeni Danaei">Shahla Momeni Danaei</name><affiliation><nlm:aff id="aff3"> Orthodontics Research Center, Dept. of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Salehi, Setareh" sort="Salehi, Setareh" uniqKey="Salehi S" first="Setareh" last="Salehi">Setareh Salehi</name><affiliation><nlm:aff id="aff4"> Undergraduate Student, Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</nlm:aff></affiliation></author><author><name sortKey="Hamedani, Shahram" sort="Hamedani, Shahram" uniqKey="Hamedani S" first="Shahram" last="Hamedani">Shahram Hamedani</name><affiliation><nlm:aff id="aff5"> Dental Research Development Center, School of Dentistry, Shiraz University of Medical Sciences, Private Practice, Shiraz, Iran.</nlm:aff></affiliation></author></analytic><series><title level="j">Journal of Dentistry</title><idno type="ISSN">2345-6485</idno><idno type="eISSN">2345-6418</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Statement of the Problem</title><p> Anatomic variations of the maxillary sinus can be detected in cone-beam computed tomography (CBCT) and may assist to locate the posterior superior alveolar artery (PSAA) and define the maxillary sinus morphology more accurately for a more strict surgical treatment plan.
</p></sec><sec><title>Purpose</title><p> The study aimed to determine normal variations of the maxillary sinus with the aid of CBCT in a sample population in south of Iran.
</p></sec><sec><title>Materials and Method</title><p>This cross-sectional prevalence study was based on evaluation of 198 projection data of CBCT scans of some Iranian patients aged 18-45 who referred to a private oral and maxillofacial radiology center in Shiraz from 2011 to 2013. CBCT scans were taken and analyzed with NewTom VGi device and software. The anatomic variations which were evaluated in the axial images included the presence of alveolar pneumatization, anterior pneumatization, exostosis, and hypoplasia. Moreover the location and height of sinus septa, and the location of PSAA were assessed. SPSS software (version 17.0) was used to analyze the data.
</p></sec><sec><title>Results</title><p> In a total of 396 examined sinuses, maxillary sinus alveolar pneumatization was the most common anatomic variation detected. Anterior pneumatization was detected in 96 sinuses (24.2%). Antral septa were found in 180 sinuses (45.4%) and were mostly located in the anterior region. Meanwhile, PSAA was mostly detected intra-osseous in 242 sinuses (65.7%).
</p></sec><sec><title>Conclusion</title><p> Anatomic variations of the maxillary sinus were common findings in CBCT of the maxilla. Preoperative imaging with CBCT seems to be very helpful for assessing the location of PSAA and the maxillary sinus morphology, which may be used to adjust the surgical treatment plan to yield more successful treatments.
</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Orhan, K" uniqKey="Orhan K">K Orhan</name></author><author><name sortKey="Kusakci Seker, B" uniqKey="Kusakci Seker B">B Kusakci Seker</name></author><author><name sortKey="Aksoy, S" uniqKey="Aksoy S">S Aksoy</name></author><author><name sortKey="Bayindir, H" uniqKey="Bayindir H">H Bayindir</name></author><author><name sortKey="Berbero Lu, A" uniqKey="Berbero Lu A">A Berberoğlu</name></author><author><name sortKey="Seker, E" uniqKey="Seker E">E Seker</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lana, Jp" uniqKey="Lana J">JP Lana</name></author><author><name sortKey="Carneiro, Pm" uniqKey="Carneiro P">PM Carneiro</name></author><author><name sortKey="Machado Vde, C" uniqKey="Machado Vde C">C Machado Vde</name></author><author><name sortKey="De Souza, Pe" uniqKey="De Souza P">PE de Souza</name></author><author><name sortKey="Manzi, Fr" uniqKey="Manzi F">FR Manzi</name></author><author><name sortKey="Horta, Mc" uniqKey="Horta M">MC Horta</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Faramarzie, M" uniqKey="Faramarzie M">M Faramarzie</name></author><author><name sortKey="Babaloo, Ar" uniqKey="Babaloo A">AR Babaloo</name></author><author><name sortKey="Ghertasi Oskouei, S" uniqKey="Ghertasi Oskouei S">S Ghertasi Oskouei</name></author><author><name sortKey="Faramarzie, M" uniqKey="Faramarzie M">M Faramarzie</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Stammberger, H" uniqKey="Stammberger H">H Stammberger</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Weed, Dt" uniqKey="Weed D">DT Weed</name></author><author><name sortKey="Cole, Rr" uniqKey="Cole R">RR Cole</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kapoor, Pk" uniqKey="Kapoor P">PK Kapoor</name></author><author><name sortKey="Kumar, Bn" uniqKey="Kumar B">BN Kumar</name></author><author><name sortKey="Watson, Sd" uniqKey="Watson S">SD Watson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pommer, B" uniqKey="Pommer B">B Pommer</name></author><author><name sortKey="Ulm, C" uniqKey="Ulm C">C Ulm</name></author><author><name sortKey="Lorenzoni, M" uniqKey="Lorenzoni M">M Lorenzoni</name></author><author><name sortKey="Palmer, R" uniqKey="Palmer R">R Palmer</name></author><author><name sortKey="Watzek, G" uniqKey="Watzek G">G Watzek</name></author><author><name sortKey="Zechner, W" uniqKey="Zechner W">W Zechner</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kim, Mj" uniqKey="Kim M">MJ Kim</name></author><author><name sortKey="Jung, Uw" uniqKey="Jung U">UW Jung</name></author><author><name sortKey="Kim, Cs" uniqKey="Kim C">CS Kim</name></author><author><name sortKey="Kim, Kd" uniqKey="Kim K">KD Kim</name></author><author><name sortKey="Choi, Sh" uniqKey="Choi S">SH Choi</name></author><author><name sortKey="Kim, Ck" uniqKey="Kim C">CK Kim</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Koymen, R" uniqKey="Koymen R">R Koymen</name></author><author><name sortKey="Gocmen Mas, N" uniqKey="Gocmen Mas N">N Gocmen-Mas</name></author><author><name sortKey="Karacayli, U" uniqKey="Karacayli U">U Karacayli</name></author><author><name sortKey="Ortakoglu, K" uniqKey="Ortakoglu K">K Ortakoglu</name></author><author><name sortKey="Ozen, T" uniqKey="Ozen T">T Ozen</name></author><author><name sortKey="Yazici, Ac" uniqKey="Yazici A">AC Yazici</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Krennmair, G" uniqKey="Krennmair G">G Krennmair</name></author><author><name sortKey="Ulm, C" uniqKey="Ulm C">C Ulm</name></author><author><name sortKey="Lugmayr, H" uniqKey="Lugmayr H">H Lugmayr</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Krennmair, G" uniqKey="Krennmair G">G Krennmair</name></author><author><name sortKey="Ulm, Cw" uniqKey="Ulm C">CW Ulm</name></author><author><name sortKey="Lugmayr, H" uniqKey="Lugmayr H">H Lugmayr</name></author><author><name sortKey="Solar, P" uniqKey="Solar P">P Solar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Naitoh, M" uniqKey="Naitoh M">M Naitoh</name></author><author><name sortKey="Suenaga, Y" uniqKey="Suenaga Y">Y Suenaga</name></author><author><name sortKey="Kondo, S" uniqKey="Kondo S">S Kondo</name></author><author><name sortKey="Gotoh, K" uniqKey="Gotoh K">K Gotoh</name></author><author><name sortKey="Ariji, E" uniqKey="Ariji E">E Ariji</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Velasquez Plata, D" uniqKey="Velasquez Plata D">D Velásquez-Plata</name></author><author><name sortKey="Hovey, Lr" uniqKey="Hovey L">LR Hovey</name></author><author><name sortKey="Peach, Cc" uniqKey="Peach C">CC Peach</name></author><author><name sortKey="Alder, Me" uniqKey="Alder M">ME Alder</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kasabah, S" uniqKey="Kasabah S">S Kasabah</name></author><author><name sortKey="Slezak, R" uniqKey="Slezak R">R Slezák</name></author><author><name sortKey="Simunek, A" uniqKey="Simunek A">A Simůnek</name></author><author><name sortKey="Krug, J" uniqKey="Krug J">J Krug</name></author><author><name sortKey="Lecaro, Mc" uniqKey="Lecaro M">MC Lecaro</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Almog, Dm" uniqKey="Almog D">DM Almog</name></author><author><name sortKey="Romano, Pr" uniqKey="Romano P">PR Romano</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mozzo, P" uniqKey="Mozzo P">P Mozzo</name></author><author><name sortKey="Procacci, C" uniqKey="Procacci C">C Procacci</name></author><author><name sortKey="Tacconi, A" uniqKey="Tacconi A">A Tacconi</name></author><author><name sortKey="Martini, Pt" uniqKey="Martini P">PT Martini</name></author><author><name sortKey="Andreis, Ia" uniqKey="Andreis I">IA Andreis</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ilguy, D" uniqKey="Ilguy D">D Ilgüy</name></author><author><name sortKey="Ilguy, M" uniqKey="Ilguy M">M Ilgüy</name></author><author><name sortKey="Dolekoglu, S" uniqKey="Dolekoglu S">S Dolekoglu</name></author><author><name sortKey="Fisekcioglu, E" uniqKey="Fisekcioglu E">E Fisekcioglu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Strong, C" uniqKey="Strong C">C Strong</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rahpeyma, A" uniqKey="Rahpeyma A">A Rahpeyma</name></author><author><name sortKey="Khajehahmadi, S" uniqKey="Khajehahmadi S">S Khajehahmadi</name></author><author><name sortKey="Amini, P" uniqKey="Amini P">P Amini</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ella, B" uniqKey="Ella B">B Ella</name></author><author><name sortKey="Sedarat, C" uniqKey="Sedarat C">C Sédarat</name></author><author><name sortKey="Noble, Rda" uniqKey="Noble R">Rda Noble</name></author><author><name sortKey="Normand, E" uniqKey="Normand E">E Normand</name></author><author><name sortKey="Lauverjat, Y" uniqKey="Lauverjat Y">Y Lauverjat</name></author><author><name sortKey="Siberchicot, F" uniqKey="Siberchicot F">F Siberchicot</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fatterpekar, Gm" uniqKey="Fatterpekar G">GM Fatterpekar</name></author><author><name sortKey="Delman, Bn" uniqKey="Delman B">BN Delman</name></author><author><name sortKey="Som, Pm" uniqKey="Som P">PM Som</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="White, S" uniqKey="White S">S White</name></author><author><name sortKey="Pharoah, M" uniqKey="Pharoah M">M Pharoah</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Boeddinghaus, R" uniqKey="Boeddinghaus R">R Boeddinghaus</name></author><author><name sortKey="Whyte, A" uniqKey="Whyte A">A Whyte</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Koong, B" uniqKey="Koong B">B Koong</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Liang, X" uniqKey="Liang X">X Liang</name></author><author><name sortKey="Jacobs, R" uniqKey="Jacobs R">R Jacobs</name></author><author><name sortKey="Hassan, B" uniqKey="Hassan B">B Hassan</name></author><author><name sortKey="Li, L" uniqKey="Li L">L Li</name></author><author><name sortKey="Pauwels, R" uniqKey="Pauwels R">R Pauwels</name></author><author><name sortKey="Corpas, L" uniqKey="Corpas L">L Corpas</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Loubele, M" uniqKey="Loubele M">M Loubele</name></author><author><name sortKey="Bogaerts, R" uniqKey="Bogaerts R">R Bogaerts</name></author><author><name sortKey="Van, Dijck" uniqKey="Van D">Dijck Van</name></author><author><name sortKey="Pauwels, R" uniqKey="Pauwels R">R Pauwels</name></author><author><name sortKey="Vanheusden, S" uniqKey="Vanheusden S">S Vanheusden</name></author><author><name sortKey="Suetens, P" uniqKey="Suetens P">P Suetens</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ludlow, Jb" uniqKey="Ludlow J">JB Ludlow</name></author><author><name sortKey="Davies Ludlow, Le" uniqKey="Davies Ludlow L">LE Davies-Ludlow</name></author><author><name sortKey="Brooks, Sl" uniqKey="Brooks S">SL Brooks</name></author><author><name sortKey="Howerton, Wb" uniqKey="Howerton W">WB Howerton</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ludlow, Jb" uniqKey="Ludlow J">JB Ludlow</name></author><author><name sortKey="Ivanovic, M" uniqKey="Ivanovic M">M Ivanovic</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Dobele, I" uniqKey="Dobele I">I Dobele</name></author><author><name sortKey="Kise, L" uniqKey="Kise L">L Kise</name></author><author><name sortKey="Apse, P" uniqKey="Apse P">P Apse</name></author><author><name sortKey="Kragis, G" uniqKey="Kragis G">G Kragis</name></author><author><name sortKey="Bigestans, A" uniqKey="Bigestans A">A Bigestans</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Okano, T" uniqKey="Okano T">T Okano</name></author><author><name sortKey="Harata, Y" uniqKey="Harata Y">Y Harata</name></author><author><name sortKey="Sugihara, Y" uniqKey="Sugihara Y">Y Sugihara</name></author><author><name sortKey="Sakaino, R" uniqKey="Sakaino R">R Sakaino</name></author><author><name sortKey="Tsuchida, R" uniqKey="Tsuchida R">R Tsuchida</name></author><author><name sortKey="Iwai, K" uniqKey="Iwai K">K Iwai</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Xu, J" uniqKey="Xu J">J Xu</name></author><author><name sortKey="Reh, Dd" uniqKey="Reh D">DD Reh</name></author><author><name sortKey="Carey, Jp" uniqKey="Carey J">JP Carey</name></author><author><name sortKey="Mahesh, M" uniqKey="Mahesh M">M Mahesh</name></author><author><name sortKey="Siewerdsen, Jh" uniqKey="Siewerdsen J">JH Siewerdsen</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Carrafiello, G" uniqKey="Carrafiello G">G Carrafiello</name></author><author><name sortKey="Dizonno, M" uniqKey="Dizonno M">M Dizonno</name></author><author><name sortKey="Colli, V" uniqKey="Colli V">V Colli</name></author><author><name sortKey="Strocchi, S" uniqKey="Strocchi S">S Strocchi</name></author><author><name sortKey="Pozzi Taubert, S" uniqKey="Pozzi Taubert S">S Pozzi Taubert</name></author><author><name sortKey="Leonardi, A" uniqKey="Leonardi A">A Leonardi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gonzalez Santana, H" uniqKey="Gonzalez Santana H">H González-Santana</name></author><author><name sortKey="Pe Arrocha Diago, M" uniqKey="Pe Arrocha Diago M">M Peñarrocha-Diago</name></author><author><name sortKey="Guarinos Carb, J" uniqKey="Guarinos Carb J">J Guarinos-Carbó</name></author><author><name sortKey="Sorni Broker, M" uniqKey="Sorni Broker M">M Sorní-Bröker</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Khajehahmadi, S" uniqKey="Khajehahmadi S">S Khajehahmadi</name></author><author><name sortKey="Rahpeyma, A" uniqKey="Rahpeyma A">A Rahpeyma</name></author><author><name sortKey="Hoseini, Zarch" uniqKey="Hoseini Z">Zarch Hoseini</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Guncu, Gn" uniqKey="Guncu G">GN Güncü</name></author><author><name sortKey="Yildirim, Yd" uniqKey="Yildirim Y">YD Yildirim</name></author><author><name sortKey="Wang, Hl" uniqKey="Wang H">HL Wang</name></author><author><name sortKey="Tozum, Tf" uniqKey="Tozum T">TF Tözüm</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Elian, N" uniqKey="Elian N">N Elian</name></author><author><name sortKey="Wallace, S" uniqKey="Wallace S">S Wallace</name></author><author><name sortKey="Cho, Sc" uniqKey="Cho S">SC Cho</name></author><author><name sortKey="Jalbout, Zn" uniqKey="Jalbout Z">ZN Jalbout</name></author><author><name sortKey="Froum, S" uniqKey="Froum S">S Froum</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mardinger, O" uniqKey="Mardinger O">O Mardinger</name></author><author><name sortKey="Abba, M" uniqKey="Abba M">M Abba</name></author><author><name sortKey="Hirshberg, A" uniqKey="Hirshberg A">A Hirshberg</name></author><author><name sortKey="Schwartz Arad, D" uniqKey="Schwartz Arad D">D Schwartz-Arad</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Betts, Nj" uniqKey="Betts N">NJ Betts</name></author><author><name sortKey="Miloro, M" uniqKey="Miloro M">M Miloro</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Van Den Bergh, Jp" uniqKey="Van Den Bergh J">JP Van den Bergh</name></author><author><name sortKey="Ten Bruggenkate, Cm" uniqKey="Ten Bruggenkate C">CM ten Bruggenkate</name></author><author><name sortKey="Disch, Fj" uniqKey="Disch F">FJ Disch</name></author><author><name sortKey="Tuinzing, Db" uniqKey="Tuinzing D">DB Tuinzing</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Abrahams, Jj" uniqKey="Abrahams J">JJ Abrahams</name></author><author><name sortKey="Hayt, Mw" uniqKey="Hayt M">MW Hayt</name></author><author><name sortKey="Rock, R" uniqKey="Rock R">R Rock</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Aimetti, M" uniqKey="Aimetti M">M Aimetti</name></author><author><name sortKey="Romagnoli, R" uniqKey="Romagnoli R">R Romagnoli</name></author><author><name sortKey="Ricci, G" uniqKey="Ricci G">G Ricci</name></author><author><name sortKey="Massei, G" uniqKey="Massei G">G Massei</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ten Bruggenkate, Cm" uniqKey="Ten Bruggenkate C">CM Ten Bruggenkate</name></author><author><name sortKey="Van Den Bergh, Jp" uniqKey="Van Den Bergh J">JP van den Bergh</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hatano, N" uniqKey="Hatano N">N Hatano</name></author><author><name sortKey="Shimizu, Y" uniqKey="Shimizu Y">Y Shimizu</name></author><author><name sortKey="Ooya, K" uniqKey="Ooya K">K Ooya</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Katranji, A" uniqKey="Katranji A">A Katranji</name></author><author><name sortKey="Fotek, P" uniqKey="Fotek P">P Fotek</name></author><author><name sortKey="Wang, Hl" uniqKey="Wang H">HL Wang</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Maestre Ferrin, L" uniqKey="Maestre Ferrin L">L Maestre-Ferrín</name></author><author><name sortKey="Carrillo Garcia, C" uniqKey="Carrillo Garcia C">C Carrillo-García</name></author><author><name sortKey="Galan Gil, S" uniqKey="Galan Gil S">S Galán-Gil</name></author><author><name sortKey="Pe Arrocha Diago, M" uniqKey="Pe Arrocha Diago M">M Peñarrocha-Diago</name></author><author><name sortKey="Pe Arrocha Diago, M" uniqKey="Pe Arrocha Diago M">M Peñarrocha-Diago</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Neugebauer, J" uniqKey="Neugebauer J">J Neugebauer</name></author><author><name sortKey="Ritter, L" uniqKey="Ritter L">L Ritter</name></author><author><name sortKey="Mischkowski, Ra" uniqKey="Mischkowski R">RA Mischkowski</name></author><author><name sortKey="Dreiseidler, T" uniqKey="Dreiseidler T">T Dreiseidler</name></author><author><name sortKey="Scherer, P" uniqKey="Scherer P">P Scherer</name></author><author><name sortKey="Ketterle, M" uniqKey="Ketterle M">M Ketterle</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ulm, Cw" uniqKey="Ulm C">CW Ulm</name></author><author><name sortKey="Solar, P" uniqKey="Solar P">P Solar</name></author><author><name sortKey="Krennmair, G" uniqKey="Krennmair G">G Krennmair</name></author><author><name sortKey="Matejka, M" uniqKey="Matejka M">M Matejka</name></author><author><name sortKey="Watzek, G" uniqKey="Watzek G">G Watzek</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Selcuk, A" uniqKey="Selcuk A">A Selcuk</name></author><author><name sortKey="Ozcan, Km" uniqKey="Ozcan K">KM Ozcan</name></author><author><name sortKey="Akdogan, O" uniqKey="Akdogan O">O Akdogan</name></author><author><name sortKey="Bilal, N" uniqKey="Bilal N">N Bilal</name></author><author><name sortKey="Dere, H" uniqKey="Dere H">H Dere</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hadchiti, W" uniqKey="Hadchiti W">W Hadchiti</name></author><author><name sortKey="Nasseh, I" uniqKey="Nasseh I">I Nasseh</name></author><author><name sortKey="Hayek, E" uniqKey="Hayek E">E Hayek</name></author><author><name sortKey="Mora, F" uniqKey="Mora F">F Mora</name></author><author><name sortKey="Bouchard, P" uniqKey="Bouchard P">P Bouchard</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schuh, E" uniqKey="Schuh E">E Schuh</name></author><author><name sortKey="Schmiedl, R" uniqKey="Schmiedl R">R Schmiedl</name></author><author><name sortKey="Vogel, G" uniqKey="Vogel G">G Vogel</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Gosau, M" uniqKey="Gosau M">M Gosau</name></author><author><name sortKey="Rink, D" uniqKey="Rink D">D Rink</name></author><author><name sortKey="Driemel, O" uniqKey="Driemel O">O Driemel</name></author><author><name sortKey="Draenert, Fg" uniqKey="Draenert F">FG Draenert</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Blake, Fa" uniqKey="Blake F">FA Blake</name></author><author><name sortKey="Blessmann, M" uniqKey="Blessmann M">M Blessmann</name></author><author><name sortKey="Pohlenz, P" uniqKey="Pohlenz P">P Pohlenz</name></author><author><name sortKey="Heiland, M" uniqKey="Heiland M">M Heiland</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Shiki, K" uniqKey="Shiki K">K Shiki</name></author><author><name sortKey="Tanaka, T" uniqKey="Tanaka T">T Tanaka</name></author><author><name sortKey="Kito, S" uniqKey="Kito S">S Kito</name></author><author><name sortKey="Wakasugi Sato, N" uniqKey="Wakasugi Sato N">N Wakasugi-Sato</name></author><author><name sortKey="Matsumoto Takeda, S" uniqKey="Matsumoto Takeda S">S Matsumoto-Takeda</name></author><author><name sortKey="Oda, M" uniqKey="Oda M">M Oda</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Fernandes, Cl" uniqKey="Fernandes C">CL Fernandes</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Butaric, Ln" uniqKey="Butaric L">LN Butaric</name></author><author><name sortKey="Mccarthy, Rc" uniqKey="Mccarthy R">RC McCarthy</name></author><author><name sortKey="Broadfield, Dc" uniqKey="Broadfield D">DC Broadfield</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ikeda, A" uniqKey="Ikeda A">A Ikeda</name></author><author><name sortKey="Ikeda, M" uniqKey="Ikeda M">M Ikeda</name></author><author><name sortKey="Komatsuzaki, A" uniqKey="Komatsuzaki A">A Komatsuzaki</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Dent (Shiraz)</journal-id><journal-id journal-id-type="iso-abbrev">J Dent (Shiraz)</journal-id><journal-id journal-id-type="publisher-id">JDS</journal-id><journal-title-group><journal-title>Journal of Dentistry</journal-title></journal-title-group><issn pub-type="ppub">2345-6485</issn><issn pub-type="epub">2345-6418</issn><publisher><publisher-name>Shiraz University of Medical Sciences</publisher-name><publisher-loc>Shiraz, Iran</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26966702</article-id><article-id pub-id-type="pmc">4771057</article-id><article-id pub-id-type="publisher-id">jds-17-7</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Evaluation of Anatomic Variations in Maxillary Sinus with the Aid of Cone Beam Computed Tomography (CBCT) in a Population in South of Iran</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Shahidi</surname><given-names>Shoaleh</given-names></name><xref ref-type="aff" rid="aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Zamiri</surname><given-names>Barbad</given-names></name><xref ref-type="aff" rid="aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Momeni Danaei</surname><given-names>Shahla</given-names></name><xref ref-type="aff" rid="aff3">3</xref></contrib><contrib contrib-type="author"><name><surname>Salehi</surname><given-names>Setareh</given-names></name><xref ref-type="aff" rid="aff4">4</xref></contrib><contrib contrib-type="author"><name><surname>Hamedani</surname><given-names>Shahram</given-names></name><xref ref-type="aff" rid="aff5">5</xref></contrib></contrib-group><aff id="aff1"><label>1</label> Biomaterials Research Center, Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</aff><aff id="aff2"><label>2</label> Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</aff><aff id="aff3"><label>3</label> Orthodontics Research Center, Dept. of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</aff><aff id="aff4"><label>4</label> Undergraduate Student, Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.</aff><aff id="aff5"><label>5</label> Dental Research Development Center, School of Dentistry, Shiraz University of Medical Sciences, Private Practice, Shiraz, Iran.</aff><author-notes><corresp id="cor">Correspondence: Hamedani Sh. School of Dentistry, Ghasrodasht Ave, Shiraz-Iran. P.O Box: 71345-1836 Email: Shahram.hamedani@kclalumni.net Tel and Fax: +98-713-6280458 </corresp></author-notes><pub-date pub-type="ppub"><month>3</month><year>2016</year></pub-date><volume>17</volume><issue>1</issue><fpage>7</fpage><lpage>15</lpage><history><date date-type="received"><month>10</month><year>2014</year></date><date date-type="rev-recd"><month>6</month><year>2015</year></date><date date-type="accepted"><month>7</month><year>2015</year></date></history><permissions><copyright-statement>© 2016: Journal of dentistry (Shiraz)</copyright-statement><license><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/3.0/">http://creativecommons.org/licenses/by/3.0/</ext-link>) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
</license-p></license></permissions><abstract><sec><title>Statement of the Problem</title><p> Anatomic variations of the maxillary sinus can be detected in cone-beam computed tomography (CBCT) and may assist to locate the posterior superior alveolar artery (PSAA) and define the maxillary sinus morphology more accurately for a more strict surgical treatment plan.
</p></sec><sec><title>Purpose</title><p> The study aimed to determine normal variations of the maxillary sinus with the aid of CBCT in a sample population in south of Iran.
</p></sec><sec><title>Materials and Method</title><p>This cross-sectional prevalence study was based on evaluation of 198 projection data of CBCT scans of some Iranian patients aged 18-45 who referred to a private oral and maxillofacial radiology center in Shiraz from 2011 to 2013. CBCT scans were taken and analyzed with NewTom VGi device and software. The anatomic variations which were evaluated in the axial images included the presence of alveolar pneumatization, anterior pneumatization, exostosis, and hypoplasia. Moreover the location and height of sinus septa, and the location of PSAA were assessed. SPSS software (version 17.0) was used to analyze the data.
</p></sec><sec><title>Results</title><p> In a total of 396 examined sinuses, maxillary sinus alveolar pneumatization was the most common anatomic variation detected. Anterior pneumatization was detected in 96 sinuses (24.2%). Antral septa were found in 180 sinuses (45.4%) and were mostly located in the anterior region. Meanwhile, PSAA was mostly detected intra-osseous in 242 sinuses (65.7%).
</p></sec><sec><title>Conclusion</title><p> Anatomic variations of the maxillary sinus were common findings in CBCT of the maxilla. Preoperative imaging with CBCT seems to be very helpful for assessing the location of PSAA and the maxillary sinus morphology, which may be used to adjust the surgical treatment plan to yield more successful treatments.
</p></sec></abstract><kwd-group><title>Keywords</title><kwd>Cone-beam Computed</kwd><kwd>Tomography</kwd><kwd>Normal Variations</kwd><kwd>Maxillary Sinus</kwd><kwd>Antrum</kwd><kwd>Pneumatization</kwd></kwd-group></article-meta></front><body><sec sec-type="intro"><title>Introduction</title><p>The maxillary sinus in adults is composed of a pyramid-shaped cavity in the facial skull with its base at the lateral nasal wall and its apex extending up to the zygomatic process of the maxilla.[<xref rid="B1" ref-type="bibr">1</xref>] It can exhibit anatomic variations such as pneumatization, hypoplasia, antral septa, exostosis, and variations in location of the arteries.[<xref rid="B2" ref-type="bibr">2</xref>] All the surgical interventions in the posterior maxillary region require detailed knowledge of the maxillary sinus anatomy and possible anatomical variations.[<xref rid="B3" ref-type="bibr">3</xref>]
</p><p>Maxillary sinus hypoplasia (MSH) is the under development of the maxillary sinus, which can occur during embryological development or later in life due to trauma, iatrogenic, or structural causes.[<xref rid="B4" ref-type="bibr">4</xref>] The narrow infundibular passage associated with the absence of a natural ostium would result in mucosal thickening of the hypoplastic sinus.[<xref rid="B5" ref-type="bibr">5</xref>] Furthermore, MSH causes the proximal extension of the lateral nasal wall and subsequently makes the surgical procedures difficult.[<xref rid="B2" ref-type="bibr">2</xref>, <xref rid="B6" ref-type="bibr">6</xref>]
</p><p>Maxillary sinus septa are barriers of cortical bone. The shape is described as an inverted gothic arch arising from the inferior or lateral walls of the sinus that divide the maxillary sinus floor into multiple compartments, known as recesses.[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B3" ref-type="bibr">3</xref>] These septa were first analyzed by Arthur S. Underwood, an anatomist who reported their prevalence and characteristics and these septa were afterwards, referred to as Underwood’s septa.[<xref rid="B1" ref-type="bibr">1</xref>]
</p><p>In a systematic review published by Pommer <italic>et al.</italic>,[<xref rid="B7" ref-type="bibr">7</xref>] electronic and hand searching of English literature were employed to identify the studies published from 1995 to 2011.They reported that the observed septa were at least 2-4 mm in height, and 7.5 mm on average. They were present in 28.4% of 8923 investigated sinuses (95% confidence interval: 24.3–32.5%). Septa were located in premolar, molar, and retromolar regions in 24.4%, 54.6% and 21.0% of cases, respectively. Their orientation was transverse in 87.6%, sagittal in 11.1%, and horizontal in 1.3% of the studied cases. Complete septa (dividing the sinus into two separate cavities) were found only in 0.3% of samples. Other rare conditions included multiple septa in one sinus (4.2%) and bilateral septa (17.2%). Moreover, the diagnosis of septa by using panoramic radiographs yielded incorrect results in 29% of cases.[<xref rid="B7" ref-type="bibr">7</xref>]
</p><p>Septum removal before sinus augmentation is a preferred procedure, as with the septum in place, there is a high possibility of membrane perforation that results in maxillary sinusitis.[<xref rid="B3" ref-type="bibr">3</xref>] Dental panoramic radiography, computed tomography (CT), and cone beam computed tomography (CBCT) have all been used to identify the maxillary sinus septa.[<xref rid="B8" ref-type="bibr">8</xref>-<xref rid="B15" ref-type="bibr">15</xref>] CBCT is a technique that has been proposed for maxillofacial imaging during the last decade and was first reported by Mozzo <italic>et al.</italic>[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B16" ref-type="bibr">16</xref>]
</p><p>The posterior superior alveolar artery (PSAA) and infraorbital artery (IOA) are the branches of maxillary artery that supply the lateral sinus wall and the overlying membrane. The blood supply of the maxillary sinus and Schneiderian membrane comes from the maxillary artery.[<xref rid="B17" ref-type="bibr">17</xref>] The presence of this artery was first mentioned by Strong in 1934.[<xref rid="B18" ref-type="bibr">18</xref>]
</p><p>The branches of maxillary artery should be taken into consideration because of the potential risk of bleeding during the procedures such as open sinus lift surgery, horizontal osteotomy of the maxilla, Le Fort I fracture treatment, and Caldwell-Luc surgeries.[<xref rid="B17" ref-type="bibr">17</xref>-<xref rid="B20" ref-type="bibr">20</xref>]
</p><p>In a study done by Rahpeyma <italic>et al.</italic>, thirty five CBCT scans from 35 dentate patients were selected in coronal sections of the second premolar (P2), first molar (M1), and second molar (M2). The presence of alveolar antral artery in each situation was determined and the bone thickness in the region of alveolar antral artery was measured perpendicular to the lateral wall of the maxilla. The alveolar antral artery was present in 67.1% of CBCTs.[<xref rid="B19" ref-type="bibr">19</xref>]
</p><p>Many imaging techniques such as panoramic, waters, Caldwell, CT, MRI, and CBCT can be used to study the maxillary sinuses region. For a long period, skull projections including Waters, Caldwell and lateral sinus were used for evaluation of the paranasal sinuses. Waters view is useful for gross evaluation of the maxillary sinus especially for localized mucosal thickening along the sinus floor, generalized thickening of the mucosal lining around the entire wall of the sinus, and near-complete or complete radiopacification of the sinus. Plain films are no longer considered to be a part of the primary imaging modalities. At best, they give only an overview of the anatomy and underlying pathoses, as they are limited to display three-dimensional (3D) structures in a two-dimensional (2D) plane. CT and MR imaging have the advantage of being able to show fine anatomic details in serial topographic sections, and thus excluding the gross volume averaging which is a characteristic feature in plain films. In fact, in most cases, when a plain-film study shows the probable presence of the disease, a CT or MR imaging is consequently obtained.[<xref rid="B21" ref-type="bibr">21</xref>-<xref rid="B22" ref-type="bibr">22</xref>]
</p><p>CBCT uses a cone- or pyramidal-shaped beam to acquire multiple projections in only one rotation. On the other hand, multislice computed tomography (MSCT) employs fan-shaped beams rotating around the patient to acquire multiple image slices.[<xref rid="B2" ref-type="bibr">2</xref>, <xref rid="B23" ref-type="bibr">23</xref>-<xref rid="B24" ref-type="bibr">24</xref>]
</p><p>CBCT may be recommended as a low-cost dose-sparing technique compared with standard medical computed tomography scans (MDCT), though CBCT has slightly more radiation exposure than routine panoramic radiography for dentomaxillofacial imaging.[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B16" ref-type="bibr">16</xref>, <xref rid="B25" ref-type="bibr">25</xref>-<xref rid="B31" ref-type="bibr">31</xref>]
</p><p>The effective dose from a standard dental protocol scan with MDCT is 1.5 to 12.3 times greater than comparable medium–field of view dental CBCT scans according to International Commission on Radiological Protection (ICRP 2007).[<xref rid="B16" ref-type="bibr">16</xref>] Moreover, beam-hardening artifacts due to dental materials (like amalgam and crowns) and implants are weaker at CBCT than at MSCT.[<xref rid="B32" ref-type="bibr">32</xref>]
</p><p>To minimize the risk of postoperative complications of maxillary sinus floor lift and other surgeries in this region, it is crucial to be familiar with different anatomic and pathologic findings in sinus.[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B8" ref-type="bibr">8</xref>-<xref rid="B13" ref-type="bibr">13</xref>,<xref rid="B29" ref-type="bibr">29</xref>, <xref rid="B33" ref-type="bibr">33</xref>] As the maxillary sinuses are significant anatomic structures in dental practice that their exact and definitive radiological assessment is necessary, and considering CBCT as an important diagnostic image modality in dentistry, the recognition of anatomic variations of the maxillary sinuses in CBCT is noteworthy.[<xref rid="B1" ref-type="bibr">1</xref>-<xref rid="B2" ref-type="bibr">2</xref>]
</p><p>Several studies have been performed on the prevalence of anatomic variations in different populations; however, our information is insufficient regarding the Iranian population. Therefore, the aim of the present study was to determine the maxillary sinus normal variations with the aid of CBCT in a sample of population resident in south of Iran. </p></sec><sec><title>Materials and Method</title><p>This cross-sectional prevalence study was based on evaluation of CBCT scans of some Iranian patients aged 18-45, who referred to a private oral and maxillofacial radiology center in Shiraz, from 2011 to 2013. To this end, 198 CBCT images of originally Iranian patients were selected from the archive of adults who needed those images for other justified reasons.</p><p>All CBCT images of the adult patients which showed maxillary sinuses were included in the study sample. The CBCT images of patients with systemic problems and evidence of previous trauma or manipulation of the maxillary sinuses, as well as those images with any sign of pathologic changes in maxillary sinuses were excluded from the study.</p><p>CBCT scans were taken with NewTom VGi device (covering the maxillary region, focal spot=0.3 or 0.15mm, scanning time=90s). They were analyzed by the related NewTom software on a multiplanar reconstruction window in which the axial, coronal, and sagittal planes could be visualized in 0.3 mm intervals. </p><p>To standardize the reading and interpreting of the CBCT images, two researchers were trained and calibrated by using 10% of the samples in a one-week pilot study before the data collection began.</p><p>The anatomic variations evaluated in the axial images were alveolar pneumatization, anterior pneumatization, location and height of sinus septa, exostosis, hypoplasia, and location of the PSAA.</p><p>The septa height more than 2 mm (the important factor in sinus floor elevation) was registered and location of the septa was divided into 3 groups of anterior, middle, and posterior. The distances from the artery to the medial sinus wall were determined and the locations of the artery were categorized as intra-osseous (A), below the membrane (B), and on the outer cortex of the lateral sinus wall(C). In the presence of two alveolar antral arteries in a coronal section, the larger one was considered. The presence of septa was evaluated in the coronal and sagittal images.</p><p>The SPSS software (Ver. 17.0) was used to analyze the data. The descriptive analysis was presented as frequency, mean±SD, 95% confidence intervals (CI), and the range. </p></sec><sec sec-type="results"><title>Results</title><p>In a total of 198 CBCT images, 396 sinuses were evaluated in which 130 cases belonged to females (65.7%) and 68 to males (34.3%).</p><p>Maxillary sinus alveolar pneumatization (maxillary sinus extension into alveolar process) was the most common anatomic variation detected, observed in 228 sinuses (57.5%). The pneumatization sites were multiple in 90 (65.2%) and single in 48 cases (34.8%). (<xref ref-type="table" rid="T1">Table 1</xref>)
</p><p>The anterior pneumatization was detected in 96 sinuses (24.2%), 40 single (58.8%) and 28 multiple (41.2%). Scalloped margin between teeth roots was observed in 100 sinuses (25.2%). </p><p>Maxillary sinus hypoplasia was detected only in 26 sinuses (6.5 %) that included 14 unilateral (70%) and 6 bilateral (30%) cases. (<xref ref-type="table" rid="T1">Table 1</xref>)
</p><table-wrap id="T1" position="float"><label>Table 1</label><caption><p>Frequency of normal variations</p></caption><table frame="hsides" rules="groups"><thead><tr><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" colspan="2" valign="middle" rowspan="1"> </th><th style=" color:#000000;background-color:#BFBFBF;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Hypoplasia</bold></th><th style=" color:#000000;background-color:#BFBFBF;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Exostosis</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Scalloped Margin</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Septa</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Alveolar</bold><break></break><bold>Pneumatization</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Anterior</bold><break></break><bold>Pneumatization</bold></th></tr></thead><tbody><tr><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" colspan="2" valign="middle" rowspan="1"> All sinuses </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 26 (6.5%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 13 (3.2%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 100 (52.2%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 180 (45.4%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 228 (57.5%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 96 (24.2%) </td></tr><tr><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="3" colspan="1"><break></break>Patients
</td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> Unilateral </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 14 (70%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 3 (37.5) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 44 (61.1%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 70 (56%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 48 (34.8%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 40 (58.8%) </td></tr><tr><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> Bilateral </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 6 (30%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 5 (62.5) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 28 (38.9%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 55 (44%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 90 (65.2%) </td><td style=" color:#000000;background-color:#BFBFBF;" align="left" valign="middle" rowspan="1" colspan="1"> 28 (41.2%) </td></tr><tr><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> Total </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 20 (100%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 8 (100%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 72(100%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 125 (100%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom: solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 138 (100%) </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 68 (100%) </td></tr></tbody></table></table-wrap><p>Exostosis was identified in 13 sinuses (3.28%). Antral septa were found in 180 sinuses (45.4%); bilateral in 55 (44%) and unilateral in 70 cases (56%). (<xref ref-type="table" rid="T1">Table 1</xref>)
</p><p>Sinus septum was in anterior region in 106 (58.9%), middle in 38 (21.1%), and posterior in 36 (20%) of sinuses containing septa. (<xref ref-type="fig" rid="F1">Figure 1</xref>) Sixty four (35.5%) of the septa were also detected in coronal slices and 112 (62.2%) were viewed in sagittal sections, as well. Ninety eight (54.4%) of all septa divided the sinus into 2 cells and 8 (4.4%) into 3 separate cells.
</p><fig id="F1" position="float"><label>Figure 1</label><caption><p>Locations of septa</p></caption><graphic xlink:href="jds-17-7-g001"></graphic></fig><p>The minimum and maximum height of the right sinus septum was measured to be respectively 2.1 and 23 with the mean±SD=8.17±3.6. These numbers for the left sinus septum were 3 and 25.6, respectively, with the mean±SD=8.28±4.29. (<xref ref-type="table" rid="T2">Table 2</xref>)
</p><table-wrap id="T2" position="float"><label>Table 2</label><caption><p>Measurements of sinus size</p></caption><table frame="hsides" rules="groups"><thead><tr><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="2" colspan="1"> </th><th style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" colspan="4" valign="middle" rowspan="1"><bold>Anterior-posterior</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" colspan="4" valign="middle" rowspan="1"><bold>Medial-lateral</bold></th></tr><tr><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Min</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Max</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Mean</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Std</bold></th><th style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Min</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Max</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Mean</bold></th><th style=" color:#000000;background-color:#BFBFBF;border-top:solid windowtext 1.0pt;border-left:none;border-right:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"><bold>Std</bold></th></tr></thead><tbody><tr><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> Right </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 26.5 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 48.6 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 37.2 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 4.0 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 5.4 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 20.8 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 15.0 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;" align="left" valign="middle" rowspan="1" colspan="1"> 3.1 </td></tr><tr><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> Left </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 25.8 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 45.9 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 37.2 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 3.8 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 7.5 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 22 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 14.7 </td><td style=" color:#000000;background-color:#BFBFBF;border:none;border-bottom:solid windowtext 1.0pt;" align="left" valign="middle" rowspan="1" colspan="1"> 3.1 </td></tr></tbody></table></table-wrap><p>PSAA was absent in 28 sinuses (7%). <xref ref-type="fig" rid="F2">Figure 2</xref> shows the percentage of different locations of the artery in those images in which artery was detected. The artery was located on the outer cortex of the sinus wall in 50 cases (13.5%). Moreover, the artery was intra-osseous in 242 sinuses (65.7%), and below the membrane in 76 sinuses (20.6%). The minimum and maximum distance from the artery to the medial wall on the right sinus was 10.60 and 37.50, respectively (mean±SD=24.8657± 4.94112), and 13.20 and 36.60 on the left side (mean± SD=24.8214±4.71998).
</p><fig id="F2" position="float"><label>Figure 2</label><caption><p>Location of posterior superior alveolar artery (PSAA)</p></caption><graphic xlink:href="jds-17-7-g002"></graphic></fig></sec><sec sec-type="discussion"><title>Discussion</title><p>Preoperative imaging is very important and clinically relevant for the detection of maxillary sinus variations and pathologic problems. In 3D imaging, the treatment plan can be modified and the outcome of pre-prosthetic surgery in posterior maxilla can become more predictable.[<xref rid="B29" ref-type="bibr">29</xref>]
</p><p>The alveolar antral artery is an important anatomical structure within the lateral maxillary sinus wall. The presence of this artery was first mentioned in an article by Strong published in 1934.[<xref rid="B18" ref-type="bibr">18</xref>]
</p><p>According to Ilgüy <italic>et al.</italic>[<xref rid="B17" ref-type="bibr">17</xref>] and Khajehahmadi <italic>et al.</italic>,[<xref rid="B34" ref-type="bibr">34</xref>] an important point especially in the Caldwell-Luc and open sinus lift surgery is that the maxillary sinus wall has a considerable vascular anastomosis. Damage to the vessels of the bone can cause bleeding, may obscure the physician’s line of sight, and may lead to perforation of the Schneiderian membrane, all of which prolong the operation and assessment of the sinus membrane reflection.[<xref rid="B17" ref-type="bibr">17</xref>, <xref rid="B34" ref-type="bibr">34</xref>]
</p><p>In the present study, the presence and location of the PSAA was observable through CBCT scans. The artery was observed in 93% of the sinuses and was mostly intraosseous (65.7%). The success rate for identifying the artery was higher than that reported by Ilgüy <italic>et al.</italic> (89.3%),[<xref rid="B17" ref-type="bibr">17</xref>] Güncü <italic>et al.</italic> (64.5%),[<xref rid="B35" ref-type="bibr">35</xref>] Elian <italic>et al.</italic> (52.9%),[<xref rid="B36" ref-type="bibr">36</xref>] Mardinger <italic>et al.</italic> (55%),[<xref rid="B37" ref-type="bibr">37</xref>]and Kim <italic>et al.</italic> (52%).[<xref rid="B8" ref-type="bibr">8</xref>] This may be related to the method and resolution of the advanced images that were used to detect and describe the artery.
</p><p>CBCT provides accurate and reliable linear measurements for reconstruction and imaging of dental and maxillofacial structures. In the study by Ilgüy <italic>et al.</italic> in 2013, the distance of the artery from the medial sinus wall was 13.92±2.84 mm;[<xref rid="B17" ref-type="bibr">17</xref>] while in our study, this number was 24.8657±4.94mm on the right sinus and 24.8214±4.71mm on the left sinus. These differences may be explained by the anatomic variation in the positions of arteries and the populations that were examined.
</p><p>According to Naitoh <italic>et al.</italic>, antral septa was defined as a pointed bone structure and maxillary sinus exostosis as a rounded bone structure, both of which originated from any maxillary sinus wall.[<xref rid="B12" ref-type="bibr">12</xref>] Van den Bergh <italic>et al.</italic> emphasized that antral septa, detected in almost half of the CBCT exams, might increase the risk of sinus membrane perforation during the maxillary sinus floor elevation surgery.[<xref rid="B39" ref-type="bibr">39</xref>] Abrahams <italic>et al.</italic> and Aimetti <italic>et al.</italic> reported that the accidental perforation of this membrane could lead to development of acute or chronic sinusitis, and subsequent bone graft resorption.[<xref rid="B40" ref-type="bibr">40</xref>-<xref rid="B41" ref-type="bibr">41</xref>] Furthermore, antral septa should be considered in lifting the bone plate and sinus membrane during surgery.[<xref rid="B42" ref-type="bibr">42</xref>]
</p><p>With normal sinus anatomy, preparation and horizontal rotation of a trap door in the maxillary sinus wall is a common procedure and is possible when the Schneiderian membrane is sufficiently lifted. The most frequent complication in this procedure would be the tearing of the sinus membrane, which is in turn correlated to the presence of septa in the maxillary sinus.[<xref rid="B39" ref-type="bibr">39</xref>, <xref rid="B42" ref-type="bibr">42</xref>-<xref rid="B43" ref-type="bibr">43</xref>]
</p><p>The presence of maxillary sinus septa can be detected in panoramic radiographs. However, CT and CBCT are definitely the preferred imaging techniques for the assessment of this anatomic variation. Krennmair <italic>et al.</italic> found that panoramic radiograph can lead to false diagnosis regarding the positive or negative identification of septa in 21.3% of cases. They stated that CT scanning was the preferred imaging method for detecting the presence (or absence) of sinus septa since it allows the high-resolution imaging of delicate bony structures.[<xref rid="B10" ref-type="bibr">10</xref>]
</p><p>According to Pommer <italic>et al.</italic>,[<xref rid="B7" ref-type="bibr">7</xref>] diagnosis of sinus septa by using 2D panoramic radiographs compared with 3D computed tomography produced incorrect results in 29% of cases. They claimed that panoramic radiographs may not image those sinus septa with sagittal orientation and might, thus, lead to false assumption of narrow internal sinus anatomy and subsequent non-augmentation of the medial portion of the sinus cavity. The pre-operative radiographic imaging of sinuses should be made concerning the surgical complications and following modifications that can be possibly made to avoid these consequences.[<xref rid="B7" ref-type="bibr">7</xref>] In case of sinus floor augmentation; it ranges from modification in the surgical access strategy (or window design) to change in implant positions or even complete avoidance of bone graft surgery. Considering the high prevalence and significant morphologic variability in sinus septa in the above-mentioned investigation, 3D radiological imaging prior to sinus floor augmentation surgery may help to reduce complications in the presence of maxillary sinus septa.[<xref rid="B7" ref-type="bibr">7</xref>]
</p><p>The range of septa prevalence was found to be 24-33% in a review article (four studies) published by Katranji <italic>et al.</italic>[<xref rid="B44" ref-type="bibr">44</xref>] and 13-35% in a review of 11 studies performed by Maestre-Ferrín <italic>et al.</italic>[<xref rid="B45" ref-type="bibr">45</xref>] which included investigations that used panoramic radiographs. The prevalence of sinus septa was found to be 16.1% in Güncü <italic>et al.</italic>’s study,[<xref rid="B35" ref-type="bibr">35</xref>] 16% in Krennmair <italic>et al.</italic>’s study,[<xref rid="B10" ref-type="bibr">10</xref>-<xref rid="B11" ref-type="bibr">11</xref>] and 26.5% in Kim <italic>et al.</italic>’s study when CT was used to assess the sinuses.[<xref rid="B8" ref-type="bibr">8</xref>]
</p><p>In a study performed in Iran with spiral CT-scan, the prevalence of at least one septum was 29.5%.[<xref rid="B3" ref-type="bibr">3</xref>] The results of the present study revealed that sinus septa were observed in 45.4% of the 396 sinuses. The results of the CT evaluation of the maxillary sinus septa in the reported articles are not consistent with those of the present study. On the other hand, much higher percentages have been reported with CBCT, and they are close to the results obtained by the current study.
</p><p>The prevalence of sinus septa was reported to be 55.2% by Ilgüy <italic>et al.</italic>,[<xref rid="B17" ref-type="bibr">17</xref>] 58% as found by Orhan <italic>et al.</italic>,[<xref rid="B1" ref-type="bibr">1</xref>]and 47% as reported by Neugebauer <italic>et al.</italic>[<xref rid="B46" ref-type="bibr">46</xref>] In another study, Lana <italic>et al.</italic> stated that the prevalence of antral septa was 44.4%.[<xref rid="B2" ref-type="bibr">2</xref>] These differences could be attributed to the different imaging modalities employed in these studies.
</p><p>Complete septa (dividing the sinus into two separate cavities) were found only in 0.3% as reported in the systemic review done by Pommer <italic>et al.</italic>,[<xref rid="B7" ref-type="bibr">7</xref>] and in 25.2 % (n=100) of the sinuses in our study.
</p><p>The analysis of the position of septa showed that sinus septum was in anterior region in 106 (58.9%), middle in 38 (21.1%), and posterior in 36 (20%) of sinuses containing septa.</p><p>In the study carried out by Faramarzie <italic>et al.</italic> in Iran, most of the septa (53.84%) were reported to be in the middle region.[<xref rid="B3" ref-type="bibr">3</xref>] In some studies, a greater number of incidence was found in the middle regions;[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B10" ref-type="bibr">10</xref>-<xref rid="B11" ref-type="bibr">11</xref>,<xref rid="B47" ref-type="bibr">47</xref>]while, several other studies detected them in the anterior [<xref rid="B9" ref-type="bibr">9</xref>, <xref rid="B13" ref-type="bibr">13</xref>] or posterior regions.[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B9" ref-type="bibr">9</xref>, <xref rid="B13" ref-type="bibr">13</xref>] Selcuk <italic>et al.</italic> found that the distribution of septa in the anterior region was higher than in the posterior region (20.3% and 2.5%, respectively).[<xref rid="B48" ref-type="bibr">48</xref>] Hadchiti <italic>et al.</italic> reported no statistically significant difference in the antero-posterior location; that is, 55 septa were posteriorly located in the molar region (28.65%), 75 were near the first and second premolar (middle area) (39.06%), and 67 septa were detected in the anterior area (32.29%).[<xref rid="B49" ref-type="bibr">49</xref>] According to Faramarzie <italic>et al.</italic>’s study, the sequence of tooth extraction can also affect the formation of antral septa in different regions of the sinus.[<xref rid="B3" ref-type="bibr">3</xref>]
</p><p>In our measurements, the mean height of septa was 8.22mm; while, previous studies reported different heights for the septa ranging from 5.6 to 20.6 mm.[<xref rid="B1" ref-type="bibr">1</xref>, <xref rid="B9" ref-type="bibr">9</xref>, <xref rid="B11" ref-type="bibr">11</xref>-<xref rid="B13" ref-type="bibr">13</xref>,<xref rid="B46" ref-type="bibr">46</xref>-<xref rid="B47" ref-type="bibr">47</xref>]
</p><p>Alveolar pneumatization was reported in approximately 50% of the population in the study by Schuh <italic>et al.</italic>,[<xref rid="B50" ref-type="bibr">50</xref>] 100% of the patients in Lana <italic>et al.</italic>’s research,[<xref rid="B2" ref-type="bibr">2</xref>] and was present in 228 sinuses (57.5%) in our study. Gosau <italic>et al.</italic> stated that atrophy of the maxilla caused by edentulism was characterized by vertical and horizontal bone loss.[<xref rid="B51" ref-type="bibr">51</xref>] The maxillary sinus pneumatization, particularly the alveolar extension, can intensify the problem of reminiscent bone caused by atrophy of the maxilla, leaving only few millimeters of bone for implant insertion.[<xref rid="B2" ref-type="bibr">2</xref>, <xref rid="B52" ref-type="bibr">52</xref>]
</p><p>The frequency of maxillary sinus hypoplasia was reported to be 4% in Shiki <italic>et al.</italic>’s study,[<xref rid="B53" ref-type="bibr">53</xref>] 4.8% in Lana <italic>et al.</italic>’s research,[<xref rid="B2" ref-type="bibr">2</xref>] and 6.5% in the current investigation. Shiki <italic>et al.</italic>,[<xref rid="B53" ref-type="bibr">53</xref>] found the antral exostosis in 3% of the population, Lana <italic>et al.</italic>[<xref rid="B2" ref-type="bibr">2</xref>] reported it to be 2.6%, and it was 3.2% in our study. These differences may be due to different sample sizes, the resolution of CBCT units which were used, as well as the anatomic variations in different populations.
</p><p>Fernandes reported that the size of maxillary sinus differed among various ethnics in different populations.[<xref rid="B54" ref-type="bibr">54</xref>] They experienced that 48.6% of European maxillary sinuses had larger maxillary sinus volumes than Zulu sinuses. Moreover, Butaric <italic>et al.</italic> reported that the Peruvian samples had lower antral volume than the Australian samples.[<xref rid="B55" ref-type="bibr">55</xref>] Another study reported that the mean maxillary sinus volume in girls was larger than that in boys aged 4-9 in a Japanese population.[<xref rid="B56" ref-type="bibr">56</xref>] Therefore, the current study seems to be justified concerning these differences observed in different ethnics. Investigating the prevalence of these important anatomical features in Iranian population, especially in different parts of the country would be helpful for young surgeons in this population.
</p></sec><sec sec-type="conclusion"><title>Conclusion</title><p>The anatomic variations of maxillary sinus are common findings in CBCT of the maxilla. Since some of these conditions can modify the surgery planning to more specialized procedures, they are crucial to be recognized in dental practice. Inevitably, preoperative imaging with CBCT is helpful for assessing the location of the PSAA, maxillary sinus morphology, and normal variations which may be used to adjust the surgical treatment plan to yield more successful treatments. </p></sec></body><back><sec><title></title><p><bold>Conflict of Interest: </bold>The authors of this manuscript certify that they have no conflict of interest regarding this research.
</p></sec><ref-list><title>References</title><ref id="B1"><label>1</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Orhan</surname><given-names>K</given-names></name><name><surname>Kusakci Seker</surname><given-names>B</given-names></name><name><surname>Aksoy</surname><given-names>S</given-names></name><name><surname>Bayindir</surname><given-names>H</given-names></name><name><surname>Berberoğlu</surname><given-names>A</given-names></name><name><surname>Seker</surname><given-names>E</given-names></name></person-group><article-title>Cone beam CT evaluation of maxillary sinus septa prevalence, height, location and morphology in children and an adult population</article-title><source> Med Princ Pract</source><year>2013</year><volume> 22</volume><fpage> 47</fpage><lpage>53</lpage><pub-id pub-id-type="pmid">22832185</pub-id></element-citation></ref><ref id="B2"><label>2</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Lana</surname><given-names>JP</given-names></name><name><surname>Carneiro</surname><given-names>PM</given-names></name><name><surname>Machado Vde</surname><given-names>C</given-names></name><name><surname>de Souza</surname><given-names>PE</given-names></name><name><surname>Manzi</surname><given-names>FR</given-names></name><name><surname>Horta</surname><given-names>MC</given-names></name></person-group><article-title>Anatomic variations and lesions of the maxillary sinus detected in cone beam computed tomography for dental implants</article-title><source> Clin Oral Implants Res</source><year>2012</year><volume> 23</volume><fpage> 1398</fpage><lpage>1403</lpage><pub-id pub-id-type="pmid">22092889</pub-id></element-citation></ref><ref id="B3"><label>3</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Faramarzie</surname><given-names>M</given-names></name><name><surname>Babaloo</surname><given-names>AR</given-names></name><name><surname>Ghertasi Oskouei</surname><given-names>S</given-names></name><name><surname>Faramarzie</surname><given-names>M</given-names></name></person-group><article-title>Prevalence, height, and location of antral septa in Iranian patients undergoing maxillary sinus lift</article-title><source> J Perio Imp Dent</source><year>2009</year><volume> 1</volume><fpage> 43</fpage><lpage>47</lpage></element-citation></ref><ref id="B4"><label>4</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Stammberger</surname><given-names>H</given-names></name></person-group><article-title>Endoscopic endonasal surgery--concepts in treatment of recurring rhinosinusitis## Part I## Anatomic and pathophysiologic considerations</article-title><source> Otolaryngol Head Neck Surg</source><year>1986</year><volume> 94</volume><fpage> 143</fpage><lpage>147</lpage><pub-id pub-id-type="pmid">3083326</pub-id></element-citation></ref><ref id="B5"><label>5</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Weed</surname><given-names>DT</given-names></name><name><surname>Cole</surname><given-names>RR</given-names></name></person-group><article-title>Maxillary sinus hypoplasia and vertical dystopia of the orbit</article-title><source> Laryngoscope</source><year>1994</year><volume> 104</volume><issue>6 Pt 1</issue><fpage> 758</fpage><lpage>762</lpage><pub-id pub-id-type="pmid">8196454</pub-id></element-citation></ref><ref id="B6"><label>6</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kapoor</surname><given-names>PK</given-names></name><name><surname>Kumar</surname><given-names>BN</given-names></name><name><surname>Watson</surname><given-names>SD</given-names></name></person-group><article-title>Maxillary sinus hypoplasia</article-title><source> J Laryngol Otol</source><year>2002</year><volume> 116</volume><fpage> 135</fpage><lpage>137</lpage><pub-id pub-id-type="pmid">11827590</pub-id></element-citation></ref><ref id="B7"><label>7</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Pommer</surname><given-names>B</given-names></name><name><surname>Ulm</surname><given-names>C</given-names></name><name><surname>Lorenzoni</surname><given-names>M</given-names></name><name><surname>Palmer</surname><given-names>R</given-names></name><name><surname>Watzek</surname><given-names>G</given-names></name><name><surname>Zechner</surname><given-names>W</given-names></name></person-group><article-title>Prevalence, location and morphology of maxillary sinus septa: systematic review and meta-analysis</article-title><source> J Clin Periodontol</source><year>2012</year><volume> 39</volume><fpage> 769</fpage><lpage>773</lpage><pub-id pub-id-type="pmid">22624862</pub-id></element-citation></ref><ref id="B8"><label>8</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kim</surname><given-names>MJ</given-names></name><name><surname>Jung</surname><given-names>UW</given-names></name><name><surname>Kim</surname><given-names>CS</given-names></name><name><surname>Kim</surname><given-names>KD</given-names></name><name><surname>Choi</surname><given-names>SH</given-names></name><name><surname>Kim</surname><given-names>CK</given-names></name><etal></etal></person-group><article-title>Maxillary sinus septa: prevalence, height, location, and morphology## A reformatted computed tomography scan analysis</article-title><source> J Periodontol</source><year>2006</year><volume> 77</volume><fpage> 903</fpage><lpage>908</lpage><pub-id pub-id-type="pmid">16671885</pub-id></element-citation></ref><ref id="B9"><label>9</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Koymen</surname><given-names>R</given-names></name><name><surname>Gocmen-Mas</surname><given-names>N</given-names></name><name><surname>Karacayli</surname><given-names>U</given-names></name><name><surname>Ortakoglu</surname><given-names>K</given-names></name><name><surname>Ozen</surname><given-names>T</given-names></name><name><surname>Yazici</surname><given-names>AC</given-names></name></person-group><article-title>Anatomic evaluation of maxillary sinus septa: surgery and radiology</article-title><source> Clin Anat</source><year>2009</year><volume> 22</volume><fpage> 563</fpage><lpage>570</lpage><pub-id pub-id-type="pmid">19484797</pub-id></element-citation></ref><ref id="B10"><label>10</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Krennmair</surname><given-names>G</given-names></name><name><surname>Ulm</surname><given-names>C</given-names></name><name><surname>Lugmayr</surname><given-names>H</given-names></name></person-group><article-title>Maxillary sinus septa: incidence, morphology and clinical implications</article-title><source> J Craniomaxillofac Surg</source><year>1997</year><volume> 25</volume><fpage> 261</fpage><lpage>265</lpage><pub-id pub-id-type="pmid">9368861</pub-id></element-citation></ref><ref id="B11"><label>11</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Krennmair</surname><given-names>G</given-names></name><name><surname>Ulm</surname><given-names>CW</given-names></name><name><surname>Lugmayr</surname><given-names>H</given-names></name><name><surname>Solar</surname><given-names>P</given-names></name></person-group><article-title>The incidence, location, and height of maxillary sinus septa in the edentulous and dentate maxilla</article-title><source> J Oral Maxillofac Surg</source><year>1999</year><volume> 57</volume><fpage> 667</fpage><lpage>671</lpage><pub-id pub-id-type="pmid">10368090</pub-id></element-citation></ref><ref id="B12"><label>12</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Naitoh</surname><given-names>M</given-names></name><name><surname>Suenaga</surname><given-names>Y</given-names></name><name><surname>Kondo</surname><given-names>S</given-names></name><name><surname>Gotoh</surname><given-names>K</given-names></name><name><surname>Ariji</surname><given-names>E</given-names></name></person-group><article-title>Assessment of maxillary sinus septa using cone-beam computed tomography: etiological consideration</article-title><source> Clin Implant Dent Relat Res</source><year>2009</year><volume> 11 Suppl 1</volume><fpage> e52</fpage><lpage>e58</lpage><pub-id pub-id-type="pmid">19438951</pub-id></element-citation></ref><ref id="B13"><label>13</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Velásquez-Plata</surname><given-names>D</given-names></name><name><surname>Hovey</surname><given-names>LR</given-names></name><name><surname>Peach</surname><given-names>CC</given-names></name><name><surname>Alder</surname><given-names>ME</given-names></name></person-group><article-title>Maxillary sinus septa: a 3-dimensional computerized tomographic scan analysis</article-title><source> Int J Oral Maxillofac Implants</source><year>2002</year><volume> 17</volume><fpage> 854</fpage><lpage>860</lpage><pub-id pub-id-type="pmid">12507246</pub-id></element-citation></ref><ref id="B14"><label>14</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kasabah</surname><given-names>S</given-names></name><name><surname>Slezák</surname><given-names>R</given-names></name><name><surname>Simůnek</surname><given-names>A</given-names></name><name><surname>Krug</surname><given-names>J</given-names></name><name><surname>Lecaro</surname><given-names>MC</given-names></name></person-group><article-title>Evaluation of the accuracy of panoramic radiograph in the definition of maxillary sinus septa</article-title><source> Acta Medica (Hradec Kralove)</source><year>2002</year><volume> 45</volume><fpage> 173</fpage><lpage>175</lpage><pub-id pub-id-type="pmid">12587786</pub-id></element-citation></ref><ref id="B15"><label>15</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Almog</surname><given-names>DM</given-names></name><name><surname>Romano</surname><given-names>PR</given-names></name></person-group><article-title>CT-based dental imaging for implant planning and surgical guidance</article-title><source> N Y State Dent J</source><year>2007</year><volume> 73</volume><fpage> 51</fpage><lpage>53</lpage><pub-id pub-id-type="pmid">17378318</pub-id></element-citation></ref><ref id="B16"><label>16</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Mozzo</surname><given-names>P</given-names></name><name><surname>Procacci</surname><given-names>C</given-names></name><name><surname>Tacconi</surname><given-names>A</given-names></name><name><surname>Martini</surname><given-names>PT</given-names></name><name><surname>Andreis</surname><given-names>IA</given-names></name></person-group><article-title>A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results</article-title><source> Eur Radiol</source><year>1998</year><volume> 8</volume><fpage> 1558</fpage><lpage>1564</lpage><pub-id pub-id-type="pmid">9866761</pub-id></element-citation></ref><ref id="B17"><label>17</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ilgüy</surname><given-names>D</given-names></name><name><surname>Ilgüy</surname><given-names>M</given-names></name><name><surname>Dolekoglu</surname><given-names>S</given-names></name><name><surname>Fisekcioglu</surname><given-names>E</given-names></name></person-group><article-title>Evaluation of the posterior superior alveolar artery and the maxillary sinus with CBCT</article-title><source> Braz Oral Res</source><year>2013</year><volume> 27</volume><fpage> 431</fpage><lpage>437</lpage><pub-id pub-id-type="pmid">24036981</pub-id></element-citation></ref><ref id="B18"><label>18</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Strong</surname><given-names>C</given-names></name></person-group><article-title>The Innervation and Vascular Supply of the Antrum: (Section of Laryngology)</article-title><source> Proc R Soc Med</source><year>1934</year><volume> 27</volume><fpage> 745</fpage><lpage>751</lpage><pub-id pub-id-type="pmid">19989772</pub-id></element-citation></ref><ref id="B19"><label>19</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Rahpeyma</surname><given-names>A</given-names></name><name><surname>Khajehahmadi</surname><given-names>S</given-names></name><name><surname>Amini</surname><given-names>P</given-names></name></person-group><article-title>Alveolar Antral Artery: Does its Diameter Correlate with Maxillary lateral wall Thickness in Dentate Patients?</article-title><source> Iran J Otorhinolaryngol</source><year>2014</year><volume> 26</volume><fpage> 163</fpage><lpage>167</lpage><pub-id pub-id-type="pmid">25009806</pub-id></element-citation></ref><ref id="B20"><label>20</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ella</surname><given-names>B</given-names></name><name><surname>Sédarat</surname><given-names>C</given-names></name><name><surname>Noble</surname><given-names>Rda</given-names></name><name><surname>Normand</surname><given-names>E</given-names></name><name><surname>Lauverjat</surname><given-names>Y</given-names></name><name><surname>Siberchicot</surname><given-names>F</given-names></name><etal></etal></person-group><article-title>Vascular connections of the lateral wall of the sinus: surgical effect in sinus augmentation</article-title><source> Int J Oral Maxillofac Implants</source><year>2008</year><volume> 23</volume><fpage> 1047</fpage><lpage>1052</lpage><pub-id pub-id-type="pmid">19216273</pub-id></element-citation></ref><ref id="B21"><label>21</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Fatterpekar</surname><given-names>GM</given-names></name><name><surname>Delman</surname><given-names>BN</given-names></name><name><surname>Som</surname><given-names>PM</given-names></name></person-group><article-title>Imaging the paranasal sinuses: where we are and where we are going</article-title><source> Anat Rec (Hoboken)</source><year>2008</year><volume> 291</volume><fpage> 1564</fpage><lpage>1572</lpage><pub-id pub-id-type="pmid">18951498</pub-id></element-citation></ref><ref id="B22"><label>22</label><element-citation publication-type="book"><person-group person-group-type="author"><name><surname>White</surname><given-names>S</given-names></name><name><surname>Pharoah</surname><given-names>M</given-names></name></person-group><source> Oral radiology: Principles and interpretation</source><year>2009</year><edition>7th ed</edition><publisher-loc>Mosby</publisher-loc><publisher-name>St## Louis</publisher-name><fpage> 472</fpage></element-citation></ref><ref id="B23"><label>23</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Boeddinghaus</surname><given-names>R</given-names></name><name><surname>Whyte</surname><given-names>A</given-names></name></person-group><article-title>Current concepts in maxillofacial imaging</article-title><source> Eur J Radiol</source><year>2008</year><volume> 66</volume><fpage> 396</fpage><lpage>418</lpage><pub-id pub-id-type="pmid">18082349</pub-id></element-citation></ref><ref id="B24"><label>24</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Koong</surname><given-names>B</given-names></name></person-group><article-title>Cone beam imaging: is this the ultimate imaging modality?</article-title><source> Clin Oral Implants Res</source><year>2010</year><volume> 21</volume><fpage> 1201</fpage><lpage>1208</lpage><pub-id pub-id-type="pmid">21039890</pub-id></element-citation></ref><ref id="B25"><label>25</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Liang</surname><given-names>X</given-names></name><name><surname>Jacobs</surname><given-names>R</given-names></name><name><surname>Hassan</surname><given-names>B</given-names></name><name><surname>Li</surname><given-names>L</given-names></name><name><surname>Pauwels</surname><given-names>R</given-names></name><name><surname>Corpas</surname><given-names>L</given-names></name><etal></etal></person-group><article-title>A comparative evaluation of Cone Beam Computed Tomography (CBCT) and Multi-Slice CT (MSCT) Part I## On subjective image quality</article-title><source> Eur J Radiol</source><year>2010</year><volume> 75</volume><fpage> 265</fpage><lpage>269</lpage><pub-id pub-id-type="pmid">19410409</pub-id></element-citation></ref><ref id="B26"><label>26</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Loubele</surname><given-names>M</given-names></name><name><surname>Bogaerts</surname><given-names>R</given-names></name><name><surname>Van</surname><given-names>Dijck</given-names></name><name><surname>Pauwels</surname><given-names>R</given-names></name><name><surname>Vanheusden</surname><given-names>S</given-names></name><name><surname>Suetens</surname><given-names>P</given-names></name><etal></etal></person-group><article-title>Comparison between effective radiation dose of CBCT and MSCT scanners for dentomaxillofacial applications</article-title><source> Eur J Radiol</source><year>2009</year><volume> 71</volume><fpage> 461</fpage><lpage>468</lpage><pub-id pub-id-type="pmid">18639404</pub-id></element-citation></ref><ref id="B27"><label>27</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ludlow</surname><given-names>JB</given-names></name><name><surname>Davies-Ludlow</surname><given-names>LE</given-names></name><name><surname>Brooks</surname><given-names>SL</given-names></name><name><surname>Howerton</surname><given-names>WB</given-names></name></person-group><article-title>Dosimetry of 3 CBCT devices for oral and maxillofacial radiology: CB Mercuray, NewTom 3G and i-CAT</article-title><source> Dentomaxillofac Radiol</source><year>2006</year><volume> 35</volume><fpage> 219</fpage><lpage>226</lpage><pub-id pub-id-type="pmid">16798915</pub-id></element-citation></ref><ref id="B28"><label>28</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ludlow</surname><given-names>JB</given-names></name><name><surname>Ivanovic</surname><given-names>M</given-names></name></person-group><article-title>Comparative dosimetry of dental CBCT devices and 64-slice CT for oral and maxillofacial radiology</article-title><source> Oral Surg Oral Med Oral Pathol Oral Radiol Endod</source><year>2008</year><volume> 106</volume><fpage> 106</fpage><lpage>114</lpage><pub-id pub-id-type="pmid">18504152</pub-id></element-citation></ref><ref id="B29"><label>29</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Dobele</surname><given-names>I</given-names></name><name><surname>Kise</surname><given-names>L</given-names></name><name><surname>Apse</surname><given-names>P</given-names></name><name><surname>Kragis</surname><given-names>G</given-names></name><name><surname>Bigestans</surname><given-names>A</given-names></name></person-group><article-title>Radiographic assessment of findings in the maxillary sinus using cone-beam computed tomography</article-title><source> Stomatologija</source><year>2013</year><volume> 15</volume><fpage> 119</fpage><lpage>122</lpage><pub-id pub-id-type="pmid">24589634</pub-id></element-citation></ref><ref id="B30"><label>30</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Okano</surname><given-names>T</given-names></name><name><surname>Harata</surname><given-names>Y</given-names></name><name><surname>Sugihara</surname><given-names>Y</given-names></name><name><surname>Sakaino</surname><given-names>R</given-names></name><name><surname>Tsuchida</surname><given-names>R</given-names></name><name><surname>Iwai</surname><given-names>K</given-names></name><etal></etal></person-group><article-title>Absorbed and effective doses from cone beam volumetric imaging for implant planning</article-title><source> Dentomaxillofac Radiol</source><year>2009</year><volume> 38</volume><fpage> 79</fpage><lpage>85</lpage><pub-id pub-id-type="pmid">19176649</pub-id></element-citation></ref><ref id="B31"><label>31</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Xu</surname><given-names>J</given-names></name><name><surname>Reh</surname><given-names>DD</given-names></name><name><surname>Carey</surname><given-names>JP</given-names></name><name><surname>Mahesh</surname><given-names>M</given-names></name><name><surname>Siewerdsen</surname><given-names>JH</given-names></name></person-group><article-title>Technical assessment of a cone-beam CT scanner for otolaryngology imaging: image quality, dose, and technique protocols</article-title><source> Med Phys</source><year>2012</year><volume> 39</volume><fpage> 4932</fpage><lpage>4942</lpage><pub-id pub-id-type="pmid">22894419</pub-id></element-citation></ref><ref id="B32"><label>32</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Carrafiello</surname><given-names>G</given-names></name><name><surname>Dizonno</surname><given-names>M</given-names></name><name><surname>Colli</surname><given-names>V</given-names></name><name><surname>Strocchi</surname><given-names>S</given-names></name><name><surname>Pozzi Taubert</surname><given-names>S</given-names></name><name><surname>Leonardi</surname><given-names>A</given-names></name><etal></etal></person-group><article-title>Comparative study of jaws with multislice computed tomography and cone-beam computed tomography</article-title><source> Radiol Med</source><year>2010</year><volume> 115</volume><fpage> 600</fpage><lpage>611</lpage><pub-id pub-id-type="pmid">20177988</pub-id></element-citation></ref><ref id="B33"><label>33</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>González-Santana</surname><given-names>H</given-names></name><name><surname>Peñarrocha-Diago</surname><given-names>M</given-names></name><name><surname>Guarinos-Carbó</surname><given-names>J</given-names></name><name><surname>Sorní-Bröker</surname><given-names>M</given-names></name></person-group><article-title>A study of the septa in the maxillary sinuses and the subantral alveolar processes in 30 patients</article-title><source> J Oral Implantol</source><year>2007</year><volume> 33</volume><fpage> 340</fpage><lpage>343</lpage><pub-id pub-id-type="pmid">18240793</pub-id></element-citation></ref><ref id="B34"><label>34</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Khajehahmadi</surname><given-names>S</given-names></name><name><surname>Rahpeyma</surname><given-names>A</given-names></name><name><surname>Hoseini</surname><given-names>Zarch</given-names></name></person-group><article-title>Association between the lateral wall thickness of the maxillary sinus and the dental status: cone beam computed tomography evaluation</article-title><source> Iran J Radiol</source><year>2014</year><volume> 11</volume><fpage> e6675</fpage><pub-id pub-id-type="pmid">24693302</pub-id></element-citation></ref><ref id="B35"><label>35</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Güncü</surname><given-names>GN</given-names></name><name><surname>Yildirim</surname><given-names>YD</given-names></name><name><surname>Wang</surname><given-names>HL</given-names></name><name><surname>Tözüm</surname><given-names>TF</given-names></name></person-group><article-title>Location of posterior superior alveolar artery and evaluation of maxillary sinus anatomy with computerized tomography: a clinical study</article-title><source> Clin Oral Implants Res</source><year>2011</year><volume> 22</volume><fpage> 1164</fpage><lpage>1167</lpage><pub-id pub-id-type="pmid">21244499</pub-id></element-citation></ref><ref id="B36"><label>36</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Elian</surname><given-names>N</given-names></name><name><surname>Wallace</surname><given-names>S</given-names></name><name><surname>Cho</surname><given-names>SC</given-names></name><name><surname>Jalbout</surname><given-names>ZN</given-names></name><name><surname>Froum</surname><given-names>S</given-names></name></person-group><article-title>Distribution of the maxillary artery as it relates to sinus floor augmentation</article-title><source> Int J Oral Maxillofac Implants</source><year>2005</year><volume> 20</volume><fpage> 784</fpage><lpage>787</lpage><pub-id pub-id-type="pmid">16274154</pub-id></element-citation></ref><ref id="B37"><label>37</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Mardinger</surname><given-names>O</given-names></name><name><surname>Abba</surname><given-names>M</given-names></name><name><surname>Hirshberg</surname><given-names>A</given-names></name><name><surname>Schwartz-Arad</surname><given-names>D</given-names></name></person-group><article-title>Prevalence, diameter and course of the maxillary intraosseous vascular canal with relation to sinus augmentation procedure: a radiographic study</article-title><source> Int J Oral Maxillofac Surg</source><year>2007</year><volume> 36</volume><fpage> 735</fpage><lpage>738</lpage><pub-id pub-id-type="pmid">17629462</pub-id></element-citation></ref><ref id="B38"><label>38</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Betts</surname><given-names>NJ</given-names></name><name><surname>Miloro</surname><given-names>M</given-names></name></person-group><article-title>Modification of the sinus lift procedure for septa in the maxillary antrum</article-title><source> J Oral Maxillofac Surg</source><year>1994</year><volume> 52</volume><fpage> 332</fpage><lpage>333</lpage><pub-id pub-id-type="pmid">8308638</pub-id></element-citation></ref><ref id="B39"><label>39</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Van den Bergh</surname><given-names>JP</given-names></name><name><surname>ten Bruggenkate</surname><given-names>CM</given-names></name><name><surname>Disch</surname><given-names>FJ</given-names></name><name><surname>Tuinzing</surname><given-names>DB</given-names></name></person-group><article-title>Anatomical aspects of sinus floor elevations</article-title><source> Clin Oral Implants Res</source><year>2000</year><volume> 11</volume><fpage> 256</fpage><lpage>265</lpage><pub-id pub-id-type="pmid">11168217</pub-id></element-citation></ref><ref id="B40"><label>40</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Abrahams</surname><given-names>JJ</given-names></name><name><surname>Hayt</surname><given-names>MW</given-names></name><name><surname>Rock</surname><given-names>R</given-names></name></person-group><article-title>Sinus lift procedure of the maxilla in patients with inadequate bone for dental implants: radiographic appearance</article-title><source> AJR Am J Roentgenol</source><year>2000</year><volume> 174</volume><fpage> 1289</fpage><lpage>1292</lpage><pub-id pub-id-type="pmid">10789779</pub-id></element-citation></ref><ref id="B41"><label>41</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Aimetti</surname><given-names>M</given-names></name><name><surname>Romagnoli</surname><given-names>R</given-names></name><name><surname>Ricci</surname><given-names>G</given-names></name><name><surname>Massei</surname><given-names>G</given-names></name></person-group><article-title>Maxillary sinus elevation: the effect of macrolacerations and microlacerations of the sinus membrane as determined by endoscopy</article-title><source> Int J Periodontics Restorative Dent</source><year>2001</year><volume> 21</volume><fpage> 581</fpage><lpage>589</lpage><pub-id pub-id-type="pmid">11794569</pub-id></element-citation></ref><ref id="B42"><label>42</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ten Bruggenkate</surname><given-names>CM</given-names></name><name><surname>van den Bergh</surname><given-names>JP</given-names></name></person-group><article-title>Maxillary sinus floor elevation: a valuable pre-prosthetic procedure</article-title><source> Periodontol 2000</source><year>1998</year><volume> 17</volume><fpage> 176</fpage><lpage>182</lpage><pub-id pub-id-type="pmid">10337323</pub-id></element-citation></ref><ref id="B43"><label>43</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Hatano</surname><given-names>N</given-names></name><name><surname>Shimizu</surname><given-names>Y</given-names></name><name><surname>Ooya</surname><given-names>K</given-names></name></person-group><article-title>A clinical long-term radiographic evaluation of graft height changes after maxillary sinus floor augmentation with a 2:1 autogenous bone/ xenograft mixture and simultaneous placement of dental implants</article-title><source> Clin Oral Implants Res</source><year>2004</year><volume> 15</volume><fpage> 339</fpage><lpage>345</lpage><pub-id pub-id-type="pmid">15142097</pub-id></element-citation></ref><ref id="B44"><label>44</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Katranji</surname><given-names>A</given-names></name><name><surname>Fotek</surname><given-names>P</given-names></name><name><surname>Wang</surname><given-names>HL</given-names></name></person-group><article-title>Sinus augmentation complications: etiology and treatment</article-title><source> Implant Dent</source><year>2008</year><volume> 17</volume><fpage> 339</fpage><lpage>349</lpage><pub-id pub-id-type="pmid">18784534</pub-id></element-citation></ref><ref id="B45"><label>45</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Maestre-Ferrín</surname><given-names>L</given-names></name><name><surname>Carrillo-García</surname><given-names>C</given-names></name><name><surname>Galán-Gil</surname><given-names>S</given-names></name><name><surname>Peñarrocha-Diago</surname><given-names>M</given-names></name><name><surname>Peñarrocha-Diago</surname><given-names>M</given-names></name></person-group><article-title>Prevalence, location, and size of maxillary sinus septa: panoramic radiograph versus computed tomography scan</article-title><source> J Oral Maxillofac Surg</source><year>2011</year><volume> 69</volume><fpage> 507</fpage><lpage>511</lpage><pub-id pub-id-type="pmid">21238847</pub-id></element-citation></ref><ref id="B46"><label>46</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Neugebauer</surname><given-names>J</given-names></name><name><surname>Ritter</surname><given-names>L</given-names></name><name><surname>Mischkowski</surname><given-names>RA</given-names></name><name><surname>Dreiseidler</surname><given-names>T</given-names></name><name><surname>Scherer</surname><given-names>P</given-names></name><name><surname>Ketterle</surname><given-names>M</given-names></name><etal></etal></person-group><article-title>Evaluation of maxillary sinus anatomy by cone-beam CT prior to sinus floor elevation</article-title><source> Int J Oral Maxillofac Implants</source><year>2010</year><volume> 25</volume><fpage> 258</fpage><lpage>265</lpage><pub-id pub-id-type="pmid">20369083</pub-id></element-citation></ref><ref id="B47"><label>47</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ulm</surname><given-names>CW</given-names></name><name><surname>Solar</surname><given-names>P</given-names></name><name><surname>Krennmair</surname><given-names>G</given-names></name><name><surname>Matejka</surname><given-names>M</given-names></name><name><surname>Watzek</surname><given-names>G</given-names></name></person-group><article-title>Incidence and suggested surgical management of septa in sinus-lift procedures</article-title><source> Int J Oral Maxillofac Implants</source><year>1995</year><volume> 10</volume><fpage> 462</fpage><lpage>465</lpage><pub-id pub-id-type="pmid">7672849</pub-id></element-citation></ref><ref id="B48"><label>48</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Selcuk</surname><given-names>A</given-names></name><name><surname>Ozcan</surname><given-names>KM</given-names></name><name><surname>Akdogan</surname><given-names>O</given-names></name><name><surname>Bilal</surname><given-names>N</given-names></name><name><surname>Dere</surname><given-names>H</given-names></name></person-group><article-title>Variations of maxillary sinus and accompanying anatomical and pathological structures</article-title><source> J Craniofac Surg</source><year>2008</year><volume> 19</volume><fpage> 159</fpage><lpage>164</lpage><pub-id pub-id-type="pmid">18216682</pub-id></element-citation></ref><ref id="B49"><label>49</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Hadchiti</surname><given-names>W</given-names></name><name><surname>Nasseh</surname><given-names>I</given-names></name><name><surname>Hayek</surname><given-names>E</given-names></name><name><surname>Mora</surname><given-names>F</given-names></name><name><surname>Bouchard</surname><given-names>P</given-names></name></person-group><article-title>Prevalence, location and orientation of maxillary sinus septa</article-title><source> Annal Oral Maxillofac Surg</source><year>2014</year><volume> 2</volume><fpage> 9</fpage></element-citation></ref><ref id="B50"><label>50</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Schuh</surname><given-names>E</given-names></name><name><surname>Schmiedl</surname><given-names>R</given-names></name><name><surname>Vogel</surname><given-names>G</given-names></name></person-group><article-title>Anatomic limits of endosseous dental implantation</article-title><source> Z Stomatol</source><year>1984</year><volume> 81</volume><fpage> 81</fpage><lpage>90</lpage><pub-id pub-id-type="pmid">6591664</pub-id></element-citation></ref><ref id="B51"><label>51</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Gosau</surname><given-names>M</given-names></name><name><surname>Rink</surname><given-names>D</given-names></name><name><surname>Driemel</surname><given-names>O</given-names></name><name><surname>Draenert</surname><given-names>FG</given-names></name></person-group><article-title>Maxillary sinus anatomy: a cadaveric study with clinical implications</article-title><source> Anat Rec (Hoboken)</source><year>2009</year><volume> 292</volume><fpage> 352</fpage><lpage>354</lpage><pub-id pub-id-type="pmid">19248167</pub-id></element-citation></ref><ref id="B52"><label>52</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Blake</surname><given-names>FA</given-names></name><name><surname>Blessmann</surname><given-names>M</given-names></name><name><surname>Pohlenz</surname><given-names>P</given-names></name><name><surname>Heiland</surname><given-names>M</given-names></name></person-group><article-title>A new imaging modality for intraoperative evaluation of sinus floor augmentation</article-title><source> Int J Oral Maxillofac Surg</source><year>2008</year><volume> 37</volume><fpage> 183</fpage><lpage>185</lpage><pub-id pub-id-type="pmid">18060742</pub-id></element-citation></ref><ref id="B53"><label>53</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Shiki</surname><given-names>K</given-names></name><name><surname>Tanaka</surname><given-names>T</given-names></name><name><surname>Kito</surname><given-names>S</given-names></name><name><surname>Wakasugi-Sato</surname><given-names>N</given-names></name><name><surname>Matsumoto-Takeda</surname><given-names>S</given-names></name><name><surname>Oda</surname><given-names>M</given-names></name><etal></etal></person-group><article-title>The significance of cone beam computed tomography for the visualization of anatomical variations and lesions in the maxillary sinus for patients hoping to have dental implant-supported maxillary restorations in a private dental office in Japan</article-title><source> Head Face Med</source><year>2014</year><volume> 10</volume><fpage> 20</fpage><pub-id pub-id-type="pmid">24884983</pub-id></element-citation></ref><ref id="B54"><label>54</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Fernandes</surname><given-names>CL</given-names></name></person-group><article-title>Volumetric analysis of maxillary sinuses of Zulu and European crania by helical, multislice computed tomography</article-title><source> J Laryngol Otol</source><year>2004</year><volume> 118</volume><fpage> 877</fpage><lpage>881</lpage><pub-id pub-id-type="pmid">15638975</pub-id></element-citation></ref><ref id="B55"><label>55</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Butaric</surname><given-names>LN</given-names></name><name><surname>McCarthy</surname><given-names>RC</given-names></name><name><surname>Broadfield</surname><given-names>DC</given-names></name></person-group><article-title>A preliminary 3D computed tomography study of the human maxillary sinus and nasal cavity</article-title><source> Am J Phys Anthropol</source><year>2010</year><volume> 143</volume><fpage> 426</fpage><lpage>436</lpage><pub-id pub-id-type="pmid">20949613</pub-id></element-citation></ref><ref id="B56"><label>56</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ikeda</surname><given-names>A</given-names></name><name><surname>Ikeda</surname><given-names>M</given-names></name><name><surname>Komatsuzaki</surname><given-names>A</given-names></name></person-group><article-title>A CT study of the course of growth of the maxillary sinus: normal subjects and subjects with chronic sinusitis</article-title><source> ORL J Otorhinolaryngol Relat Spec</source><year>1998</year><volume> 60</volume><fpage> 147</fpage><lpage>152</lpage><pub-id pub-id-type="pmid">9579359</pub-id></element-citation></ref></ref-list></back></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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