Sinus Augmentation by Platelet-Rich Fibrin Alone: A Report of Two Cases with Histological Examinations
Identifieur interne : 002A22 ( Pmc/Corpus ); précédent : 002A21; suivant : 002A23Sinus Augmentation by Platelet-Rich Fibrin Alone: A Report of Two Cases with Histological Examinations
Auteurs : Naofumi Aoki ; Takeo Kanayama ; Michinori Maeda ; Koichiro Horii ; Hironori Miyamoto ; Keinoshin Wada ; Yasutaka Ojima ; Tsukasa Tsuchimochi ; Yasuyuki ShibuyaSource :
- Case Reports in Dentistry [ 2090-6447 ] ; 2016.
Abstract
In sinus floor augmentation of an atrophic posterior maxilla, platelet-rich fibrin (PRF) has been used as a graft material. We herein report two cases with histological evaluations of PRF after the surgery. The first case was a 28-year-old female with an atrophic right posterior maxilla who was treated with sinus floor augmentation and simultaneous implant placement using PRF as the sole graft material in our hospital. Twenty-four months after surgery, the implant was unfortunately removed because of occlusal overloading by parafunctional habits. During implant replacement, a tissue sample was obtained from the site of augmentation with PRF and was evaluated histologically. The second case was a 58-year-old man with severe alveolar atrophy of the right maxilla who underwent lateral sinus augmentation using only PRF in a two-stage procedure in our hospital. Samples were obtained at the second-stage surgery and histological examinations were performed. As a result, new bone formation was confirmed histologically in both cases. Our findings show that the use of PRF as a graft material during sinus floor augmentation induces natural bone regeneration.
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DOI: 10.1155/2016/2654645
PubMed: 27795860
PubMed Central: 5066024
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Sinus Augmentation by Platelet-Rich Fibrin Alone: A Report of Two Cases with Histological Examinations</title><author><name sortKey="Aoki, Naofumi" sort="Aoki, Naofumi" uniqKey="Aoki N" first="Naofumi" last="Aoki">Naofumi Aoki</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Kanayama, Takeo" sort="Kanayama, Takeo" uniqKey="Kanayama T" first="Takeo" last="Kanayama">Takeo Kanayama</name><affiliation><nlm:aff id="I2">Hakata Dental Clinic, Fukuoka 812-0011, Japan</nlm:aff></affiliation></author><author><name sortKey="Maeda, Michinori" sort="Maeda, Michinori" uniqKey="Maeda M" first="Michinori" last="Maeda">Michinori Maeda</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Horii, Koichiro" sort="Horii, Koichiro" uniqKey="Horii K" first="Koichiro" last="Horii">Koichiro Horii</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Miyamoto, Hironori" sort="Miyamoto, Hironori" uniqKey="Miyamoto H" first="Hironori" last="Miyamoto">Hironori Miyamoto</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Wada, Keinoshin" sort="Wada, Keinoshin" uniqKey="Wada K" first="Keinoshin" last="Wada">Keinoshin Wada</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Ojima, Yasutaka" sort="Ojima, Yasutaka" uniqKey="Ojima Y" first="Yasutaka" last="Ojima">Yasutaka Ojima</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Tsuchimochi, Tsukasa" sort="Tsuchimochi, Tsukasa" uniqKey="Tsuchimochi T" first="Tsukasa" last="Tsuchimochi">Tsukasa Tsuchimochi</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Shibuya, Yasuyuki" sort="Shibuya, Yasuyuki" uniqKey="Shibuya Y" first="Yasuyuki" last="Shibuya">Yasuyuki Shibuya</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">27795860</idno><idno type="pmc">5066024</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5066024</idno><idno type="RBID">PMC:5066024</idno><idno type="doi">10.1155/2016/2654645</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">002A22</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002A22</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Sinus Augmentation by Platelet-Rich Fibrin Alone: A Report of Two Cases with Histological Examinations</title><author><name sortKey="Aoki, Naofumi" sort="Aoki, Naofumi" uniqKey="Aoki N" first="Naofumi" last="Aoki">Naofumi Aoki</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Kanayama, Takeo" sort="Kanayama, Takeo" uniqKey="Kanayama T" first="Takeo" last="Kanayama">Takeo Kanayama</name><affiliation><nlm:aff id="I2">Hakata Dental Clinic, Fukuoka 812-0011, Japan</nlm:aff></affiliation></author><author><name sortKey="Maeda, Michinori" sort="Maeda, Michinori" uniqKey="Maeda M" first="Michinori" last="Maeda">Michinori Maeda</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Horii, Koichiro" sort="Horii, Koichiro" uniqKey="Horii K" first="Koichiro" last="Horii">Koichiro Horii</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Miyamoto, Hironori" sort="Miyamoto, Hironori" uniqKey="Miyamoto H" first="Hironori" last="Miyamoto">Hironori Miyamoto</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Wada, Keinoshin" sort="Wada, Keinoshin" uniqKey="Wada K" first="Keinoshin" last="Wada">Keinoshin Wada</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Ojima, Yasutaka" sort="Ojima, Yasutaka" uniqKey="Ojima Y" first="Yasutaka" last="Ojima">Yasutaka Ojima</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Tsuchimochi, Tsukasa" sort="Tsuchimochi, Tsukasa" uniqKey="Tsuchimochi T" first="Tsukasa" last="Tsuchimochi">Tsukasa Tsuchimochi</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author><author><name sortKey="Shibuya, Yasuyuki" sort="Shibuya, Yasuyuki" uniqKey="Shibuya Y" first="Yasuyuki" last="Shibuya">Yasuyuki Shibuya</name><affiliation><nlm:aff id="I1">Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</nlm:aff></affiliation></author></analytic><series><title level="j">Case Reports in Dentistry</title><idno type="ISSN">2090-6447</idno><idno type="eISSN">2090-6455</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>In sinus floor augmentation of an atrophic posterior maxilla, platelet-rich fibrin (PRF) has been used as a graft material. We herein report two cases with histological evaluations of PRF after the surgery. The first case was a 28-year-old female with an atrophic right posterior maxilla who was treated with sinus floor augmentation and simultaneous implant placement using PRF as the sole graft material in our hospital. Twenty-four months after surgery, the implant was unfortunately removed because of occlusal overloading by parafunctional habits. During implant replacement, a tissue sample was obtained from the site of augmentation with PRF and was evaluated histologically. The second case was a 58-year-old man with severe alveolar atrophy of the right maxilla who underwent lateral sinus augmentation using only PRF in a two-stage procedure in our hospital. Samples were obtained at the second-stage surgery and histological examinations were performed. As a result, new bone formation was confirmed histologically in both cases. Our findings show that the use of PRF as a graft material during sinus floor augmentation induces natural bone regeneration.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Cricchio, G" uniqKey="Cricchio G">G. Cricchio</name></author><author><name sortKey="Sennerby, L" uniqKey="Sennerby L">L. Sennerby</name></author><author><name sortKey="Lundgren, S" uniqKey="Lundgren S">S. Lundgren</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Boyne, P J" uniqKey="Boyne P">P. J. Boyne</name></author><author><name sortKey="James, R A" uniqKey="James R">R. A. James</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Summers, R B" uniqKey="Summers R">R. B. Summers</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Browaeys, H" uniqKey="Browaeys H">H. Browaeys</name></author><author><name sortKey="Bouvry, P" uniqKey="Bouvry P">P. Bouvry</name></author><author><name sortKey="De Bruyn, H" uniqKey="De Bruyn H">H. De Bruyn</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ali, S" uniqKey="Ali S">S. Ali</name></author><author><name sortKey="Bakry, S A" uniqKey="Bakry S">S. A. Bakry</name></author><author><name sortKey="Abd Elhakam, H" uniqKey="Abd Elhakam H">H. Abd-Elhakam</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Choukroun, J" uniqKey="Choukroun J">J. Choukroun</name></author><author><name sortKey="Adda, F" uniqKey="Adda F">F. Adda</name></author><author><name sortKey="Schoeffler, C" uniqKey="Schoeffler C">C. Schoeffler</name></author><author><name sortKey="Vervelle, A" uniqKey="Vervelle A">A. Vervelle</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Inchingolo, F" uniqKey="Inchingolo F">F. Inchingolo</name></author><author><name sortKey="Tatullo, M" uniqKey="Tatullo M">M. Tatullo</name></author><author><name sortKey="Marrelli, M" uniqKey="Marrelli M">M. Marrelli</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Diss, A" uniqKey="Diss A">A. Diss</name></author><author><name sortKey="Dohan, D M" uniqKey="Dohan D">D. M. Dohan</name></author><author><name sortKey="Mouhyi, J" uniqKey="Mouhyi J">J. Mouhyi</name></author><author><name sortKey="Mahler, P" uniqKey="Mahler P">P. Mahler</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Toffler, M" uniqKey="Toffler M">M. Toffler</name></author><author><name sortKey="Toscano, N" uniqKey="Toscano N">N. Toscano</name></author><author><name sortKey="Holtzclaw, D" uniqKey="Holtzclaw D">D. Holtzclaw</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bielecki, T M" uniqKey="Bielecki T">T. M. Bielecki</name></author><author><name sortKey="Gazdzik, T S" uniqKey="Gazdzik T">T. S. Gazdzik</name></author><author><name sortKey="Arendt, J" uniqKey="Arendt J">J. Arendt</name></author><author><name sortKey="Szczepanski, T" uniqKey="Szczepanski T">T. Szczepanski</name></author><author><name sortKey="Kr L, W" uniqKey="Kr L W">W. Król</name></author><author><name sortKey="Wielkoszynski, T" uniqKey="Wielkoszynski T">T. Wielkoszynski</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Whitman, D H" uniqKey="Whitman D">D. H. Whitman</name></author><author><name sortKey="Berry, R L" uniqKey="Berry R">R. L. Berry</name></author><author><name sortKey="Green, D M" uniqKey="Green D">D. M. Green</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Yilmaz, D" uniqKey="Yilmaz D">D. Yilmaz</name></author><author><name sortKey="Dogan, N" uniqKey="Dogan N">N. Dogan</name></author><author><name sortKey="Ozkan, A" uniqKey="Ozkan A">A. Ozkan</name></author><author><name sortKey="Sencimen, M" uniqKey="Sencimen M">M. Sencimen</name></author><author><name sortKey="Ora, B E" uniqKey="Ora B">B. E. Ora</name></author><author><name sortKey="Mutlu, I" uniqKey="Mutlu I">I. Mutlu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="He, L" uniqKey="He L">L. He</name></author><author><name sortKey="Lin, Y" uniqKey="Lin Y">Y. Lin</name></author><author><name sortKey="Hu, X" uniqKey="Hu X">X. Hu</name></author><author><name sortKey="Zhang, Y" uniqKey="Zhang Y">Y. Zhang</name></author><author><name sortKey="Wu, H" uniqKey="Wu H">H. Wu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Arora, N S" uniqKey="Arora N">N. S. Arora</name></author><author><name sortKey="Ramanayake, T" uniqKey="Ramanayake T">T. Ramanayake</name></author><author><name sortKey="Ren, Y F" uniqKey="Ren Y">Y.-F. Ren</name></author><author><name sortKey="Romanos, G E" uniqKey="Romanos G">G. E. Romanos</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Choukroun, J" uniqKey="Choukroun J">J. Choukroun</name></author><author><name sortKey="Diss, A" uniqKey="Diss A">A. Diss</name></author><author><name sortKey="Simonpieri, A" uniqKey="Simonpieri A">A. Simonpieri</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Raghoebar, G M" uniqKey="Raghoebar G">G. M. Raghoebar</name></author><author><name sortKey="Schortinghuis, J" uniqKey="Schortinghuis J">J. Schortinghuis</name></author><author><name sortKey="Liem, R S B" uniqKey="Liem R">R. S. B. Liem</name></author><author><name sortKey="Ruben, J L" uniqKey="Ruben J">J. L. Ruben</name></author><author><name sortKey="Van Der Wal, J E" uniqKey="Van Der Wal J">J. E. Van Der Wal</name></author><author><name sortKey="Vissink, A" uniqKey="Vissink A">A. Vissink</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Tanaka, H" uniqKey="Tanaka H">H. Tanaka</name></author><author><name sortKey="Toyoshima, T" uniqKey="Toyoshima T">T. Toyoshima</name></author><author><name sortKey="Atsuta, I" uniqKey="Atsuta I">I. Atsuta</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Simonpieri, A" uniqKey="Simonpieri A">A. Simonpieri</name></author><author><name sortKey="Choukroun, J" uniqKey="Choukroun J">J. Choukroun</name></author><author><name sortKey="Corso, M D" uniqKey="Corso M">M. D. Corso</name></author><author><name sortKey="Sammartino, G" uniqKey="Sammartino G">G. Sammartino</name></author><author><name sortKey="Ehrenfest, D M D" uniqKey="Ehrenfest D">D. M. D. Ehrenfest</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kanayama, T" uniqKey="Kanayama T">T. Kanayama</name></author><author><name sortKey="Horii, K" uniqKey="Horii K">K. Horii</name></author><author><name sortKey="Senga, Y" uniqKey="Senga Y">Y. Senga</name></author><author><name sortKey="Shibuya, Y" uniqKey="Shibuya Y">Y. Shibuya</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Tajima, N" uniqKey="Tajima N">N. Tajima</name></author><author><name sortKey="Ohba, S" uniqKey="Ohba S">S. Ohba</name></author><author><name sortKey="Sawase, T" uniqKey="Sawase T">T. Sawase</name></author><author><name sortKey="Asahina, I" uniqKey="Asahina I">I. Asahina</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mazor, Z" uniqKey="Mazor Z">Z. Mazor</name></author><author><name sortKey="Horowitz, R A" uniqKey="Horowitz R">R. A. Horowitz</name></author><author><name sortKey="Del Corso, M" uniqKey="Del Corso M">M. Del Corso</name></author><author><name sortKey="Prasad, H S" uniqKey="Prasad H">H. S. Prasad</name></author><author><name sortKey="Rohrer, M D" uniqKey="Rohrer M">M. D. Rohrer</name></author><author><name sortKey="Ehrenfest, D M D" uniqKey="Ehrenfest D">D. M. D. Ehrenfest</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kim, Y K" uniqKey="Kim Y">Y.-K. Kim</name></author><author><name sortKey="Yun, P Y" uniqKey="Yun P">P.-Y. Yun</name></author><author><name sortKey="Kim, S G" uniqKey="Kim S">S.-G. Kim</name></author><author><name sortKey="Lim, S C" uniqKey="Lim S">S.-C. Lim</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pinchasov, G" uniqKey="Pinchasov G">G. Pinchasov</name></author><author><name sortKey="Juodzbalys, G" uniqKey="Juodzbalys G">G. Juodzbalys</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Si, M S" uniqKey="Si M">M.-S. Si</name></author><author><name sortKey="Shou, Y W" uniqKey="Shou Y">Y.-W. Shou</name></author><author><name sortKey="Shi, Y T" uniqKey="Shi Y">Y.-T. Shi</name></author><author><name sortKey="Yang, G L" uniqKey="Yang G">G.-L. Yang</name></author><author><name sortKey="Wang, H M" uniqKey="Wang H">H.-M. Wang</name></author><author><name sortKey="He, F M" uniqKey="He F">F.-M. He</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Riben, C" uniqKey="Riben C">C. Riben</name></author><author><name sortKey="Thor, A" uniqKey="Thor A">A. Thor</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Nedir, R" uniqKey="Nedir R">R. Nedir</name></author><author><name sortKey="Nurdin, N" uniqKey="Nurdin N">N. Nurdin</name></author><author><name sortKey="Khoury, P" uniqKey="Khoury P">P. Khoury</name></author><author><name sortKey="Bischof, M" uniqKey="Bischof M">M. Bischof</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Dohan, D M" uniqKey="Dohan D">D. M. Dohan</name></author><author><name sortKey="Choukroun, J" uniqKey="Choukroun J">J. Choukroun</name></author><author><name sortKey="Diss, A" uniqKey="Diss A">A. Diss</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kumar, V R" uniqKey="Kumar V">V. R. Kumar</name></author><author><name sortKey="Gangadharan, G" uniqKey="Gangadharan G">G. Gangadharan</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">Case Rep Dent</journal-id><journal-id journal-id-type="iso-abbrev">Case Rep Dent</journal-id><journal-id journal-id-type="publisher-id">CRID</journal-id><journal-title-group><journal-title>Case Reports in Dentistry</journal-title></journal-title-group><issn pub-type="ppub">2090-6447</issn><issn pub-type="epub">2090-6455</issn><publisher><publisher-name>Hindawi Publishing Corporation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">27795860</article-id><article-id pub-id-type="pmc">5066024</article-id><article-id pub-id-type="doi">10.1155/2016/2654645</article-id><article-categories><subj-group subj-group-type="heading"><subject>Case Report</subject></subj-group></article-categories><title-group><article-title>Sinus Augmentation by Platelet-Rich Fibrin Alone: A Report of Two Cases with Histological Examinations</article-title></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid" authenticated="false">http://orcid.org/0000-0003-4017-2360</contrib-id><name><surname>Aoki</surname><given-names>Naofumi</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib><contrib contrib-type="author"><name><surname>Kanayama</surname><given-names>Takeo</given-names></name><xref ref-type="aff" rid="I2"><sup>2</sup></xref></contrib><contrib contrib-type="author"><name><surname>Maeda</surname><given-names>Michinori</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Horii</surname><given-names>Koichiro</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Miyamoto</surname><given-names>Hironori</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Wada</surname><given-names>Keinoshin</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Ojima</surname><given-names>Yasutaka</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Tsuchimochi</surname><given-names>Tsukasa</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Shibuya</surname><given-names>Yasuyuki</given-names></name><xref ref-type="aff" rid="I1"><sup>1</sup></xref></contrib></contrib-group><aff id="I1"><sup>1</sup>Department of Oral Maxillofacial Surgery, Graduate School of Medical Sciences, Nagoya City University, Nagoya 467-8601, Japan</aff><aff id="I2"><sup>2</sup>Hakata Dental Clinic, Fukuoka 812-0011, Japan</aff><author-notes><corresp id="cor1">*Naofumi Aoki: <email>nao70231011@gmail.com</email></corresp><fn fn-type="other"><p>Academic Editor: Anastasios Markopoulos</p></fn></author-notes><pub-date pub-type="ppub"><year>2016</year></pub-date><pub-date pub-type="epub"><day>3</day><month>10</month><year>2016</year></pub-date><volume>2016</volume><elocation-id>2654645</elocation-id><history><date date-type="received"><day>20</day><month>4</month><year>2016</year></date><date date-type="rev-recd"><day>25</day><month>7</month><year>2016</year></date><date date-type="accepted"><day>26</day><month>7</month><year>2016</year></date></history><permissions><copyright-statement>Copyright © 2016 Naofumi Aoki et al.</copyright-statement><copyright-year>2016</copyright-year><license xlink:href="https://creativecommons.org/licenses/by/4.0/"><license-p>This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><p>In sinus floor augmentation of an atrophic posterior maxilla, platelet-rich fibrin (PRF) has been used as a graft material. We herein report two cases with histological evaluations of PRF after the surgery. The first case was a 28-year-old female with an atrophic right posterior maxilla who was treated with sinus floor augmentation and simultaneous implant placement using PRF as the sole graft material in our hospital. Twenty-four months after surgery, the implant was unfortunately removed because of occlusal overloading by parafunctional habits. During implant replacement, a tissue sample was obtained from the site of augmentation with PRF and was evaluated histologically. The second case was a 58-year-old man with severe alveolar atrophy of the right maxilla who underwent lateral sinus augmentation using only PRF in a two-stage procedure in our hospital. Samples were obtained at the second-stage surgery and histological examinations were performed. As a result, new bone formation was confirmed histologically in both cases. Our findings show that the use of PRF as a graft material during sinus floor augmentation induces natural bone regeneration.</p></abstract><funding-group><award-group><funding-source>Ethics Committee of Nagoya City University Hospital</funding-source><award-id>46-10-0004</award-id></award-group></funding-group></article-meta></front><body><sec id="sec1"><title>1. Introduction</title><p>In the posterior maxillary area, insufficient vertical height of the alveolar bone due to the presence of the maxillary sinus, postextraction bone resorption, and poor quality and quantity of alveolar bone may limit implant placement [<xref rid="B1" ref-type="bibr">1</xref>]. In such cases, several sinus augmentation procedures for implant placement have been introduced since the 1980s [<xref rid="B2" ref-type="bibr">2</xref>, <xref rid="B3" ref-type="bibr">3</xref>]. The techniques create space between the maxillary alveolar process and the elevated Schneiderian membrane, which is filled with various graft materials to maintain adequate space for new bone formation. Many graft materials have been applied to these techniques such as autogenous bone, allograft, xenograft, alloplastic bone, or combinations thereof [<xref rid="B4" ref-type="bibr">4</xref>, <xref rid="B5" ref-type="bibr">5</xref>]. Although autogenous bone is considered to be the gold standard, it creates another wound at the donor site. Thus, autogenous bone is not widely used in clinical practical. The other graft materials also have limitations, including risk of infection, insufficient bone regeneration, and increased overall cost. Accordingly, no graft material appears to be superior to the others.</p><p>Platelet-rich fibrin (PRF) was first reported in 2001 by Choukroun et al. as a second-generation platelet concentrate [<xref rid="B6" ref-type="bibr">6</xref>]. Several studies have recently reported the application of PRF in dental implant surgery. Notably, PRF mixed bone substitute or PRF has so far solely been used as a graft material for sinus augmentation using both the lateral and crestal approaches [<xref rid="B7" ref-type="bibr">7</xref>–<xref rid="B9" ref-type="bibr">9</xref>]. The application of PRF for sinus augmentation is a relatively easy surgical procedure and the clinical and radiological findings have been shown to have a good effect regarding new bone formation. However, the histological findings of patients treated by this method have not frequently been investigated because it is difficult to harvest such augmented tissue for histological evaluations. We herein experienced two patients who exhibited sinus augmentation with PRF as the sole graft material and discussed the histological findings after sinus augmentation.</p></sec><sec id="sec2"><title>2. Case Presentation</title><p>We herein report the findings for two patients who underwent sinus floor augmentation using PRF as the sole graft material at the Department of Oral and Maxillofacial Surgery, Nagoya City University Hospital, Japan. The clinical procedures were performed in accordance with the Helsinki Declaration (revised in 2008) and approved by the Ethics Committee of Nagoya City University Hospital, Japan (number 46-10-0004). Both patients signed an informed consent form before treatment.</p><p>PRF is easy to prepare and cheap and has wound-healing properties for sinus membrane and bone. The focus when forming new bone in the sinus is on maintaining the Schneiderian membrane rather than promoting new bone growth. PRF may be absorbed more rapidly after surgery compared to its ability to form new bone. However, the Schneiderian membrane after sinus floor elevation with simultaneous implant placement can be maintained in a tent-like state, as the implant apexes function as “tent struts.” We decided to use PRF as a graft material because PRF has wound-healing properties and physically protects the sinus membrane during simultaneous implant placement. In addition, should PRF alone penetrate into the sinus, there is a lower risk of sinus infection than if PRF mixed with graft materials such as allografts and xenografts penetrated the sinus. Therefore, we decided to use only PRF as a graft material.</p><sec id="sec2.1"><title>2.1. Case 1</title><p>In September 2010, a 28-year-old woman was referred to our hospital complaining of loss of retention of a fixed bridge in the right maxillary molar region. The second premolar had a poor right condition and the first molar was missing. Her general health was good and she was a nonsmoker. Following second premolar extraction, she required dental implant therapy to replace her missing teeth. An initial radiographic examination showed that the alveolar bone height of this area was insufficient for implant placement (<xref ref-type="fig" rid="fig1">Figure 1</xref>). Preoperative computer tomography (CT) revealed that the residual bone height between the alveolar crest and the maxillary sinus floor was 2.7 mm in the second premolar region and 2.2 mm in the first molar region. Therefore, sinus floor elevation was planned. The operation was performed using the crestal approach using PRF as the graft material. Before grafting, PRF clots were compressed into a thin membrane according to the protocol by Choukroun et al. [<xref rid="B6" ref-type="bibr">6</xref>], and multiple PRF membranes were inserted into the sinus floor elevated site. Two implants (KYOCERA, Osaka, Japan; POIEX: diameter, 42 mm, and length, 10 mm, and diameter, 47 mm, and length, 8 mm) were simultaneously placed using the osteotome technique within the sinus augmentation area. At 6 months postoperatively, second-stage surgery was performed and screw-retained crown rehabilitation was conducted.</p><p>At 12 months postoperatively, CT of the first molar region showed increasing radiopacity within the sinus augmentation area around the implant (<xref ref-type="fig" rid="fig2">Figure 2</xref>). However, the implant in the first molar region showed mobility and was unfortunately removed at 24 months after surgery. The reason for this loss was considered to be occlusal overloading by parafunctional habits. She again required implant treatment; therefore the implant was reinserted using the CAS-KIT (Osstem Implant Co., Busan, Korea) in the slightly mesial area of the removed implant. According to the manufacturer's guideline, the CAS-drill must be used with a stopper. Using the stopper, the drill can collect a bone chip precisely from the depth of the settling zone within the drill hole. Accordingly, a bone chip within the sinus augmented area that was above the original sinus floor line was harvested using the CAS-drill with a 9 mm stopper (<xref ref-type="fig" rid="fig3">Figure 3</xref>). After drilling with a final stopper, which penetrated just until the sinus floor, the sinus membrane was lifted using hydraulic pressure and an implant (Osstem Implant Co., Busan, Korea; TSIII: diameter 5.0 mm and length 8.5 mm) was placed. Crown rehabilitation was performed 8 months after the reinsertion surgery. Samples were stained with H-E and analyzed with a light microscope (Olympus Co., Tokyo, Japan: BX51).</p></sec><sec id="sec2.2"><title>2.2. Case 2</title><p>In January 2014, a 58-year-old man was referred to our hospital from a general practitioner for implant removal because of peri-implantitis. Five implants and a fixed prosthesis had been placed in the edentulous maxilla 7 years previously. He showed no systemic pathology and he was a smoker. An initial radiographic image revealed severe bone loss around the R3 and L2 implants (<xref ref-type="fig" rid="fig4">Figure 4</xref>). Therefore, we decided to remove the implants and place additional implants into the molar area. As the bone height under the sinus in the right posterior area was less than 2 mm (<xref ref-type="fig" rid="fig5">Figure 5</xref>), the lateral window technique was chosen. First, the R3 implant was removed, the simulation sinus was elevated using the lateral window technique, 2 PRF clots were inserted inside the sinus cavity, and a PRF membrane was used to cover the osteotomy window (<xref ref-type="fig" rid="fig6">Figure 6</xref>). Three months after sinus augmentation, a tissue biopsy using the CAS-KIT for implant placement was harvested from the grafted site using PRF and implants (Osstem Implant Co., Busan, Korea; TSIII: diameter, 4.5 mm, and length, 8.5 mm) were placed using the crestal approach. Five months after surgery, the implants were osteointegrated and restoration occurred (<xref ref-type="fig" rid="fig7">Figure 7</xref>). The biopsied samples were stained with toluidine blue and analyzed with a light microscope (Olympus Co., Tokyo, Japan: BX51).</p></sec></sec><sec id="sec3"><title>3. Histological Examination</title><p>The tissue samples from Case 1 showed lamellar structures including osteocytes. Extremely mature bone tissue was observed without inflammatory cells, osteoblasts, or osteoclasts (<xref ref-type="fig" rid="fig8">Figure 8</xref>). The tissue samples from Case 2 showed woven bone around mature lamellar bone (<xref ref-type="fig" rid="fig9">Figure 9</xref>).</p></sec><sec id="sec4"><title>4. Discussion</title><p>Recently, the application of autologous platelet concentrates to enhance bone regeneration has increased in maxillofacial surgery [<xref rid="B10" ref-type="bibr">10</xref>]. The use of platelet-rich plasma (PRP) was first reported in oral surgery procedures [<xref rid="B11" ref-type="bibr">11</xref>]. However, there are potential risks with this material, as PRP contains synthetic or anticoagulant materials. On the other hand, PRF developed by Choukroun et al. does not require heterogeneous agents. PRF is preferred to PRP because PRF is safer and cheaper to prepare, and the production time is shorter [<xref rid="B12" ref-type="bibr">12</xref>]. Furthermore, PRF has advantages over PRP in biological activation. PRF contains more growth factors than PRP and releases these growth factors gradually. The growth factors are expressed more strongly and exert a more durable effect on proliferation and differentiation than PRP [<xref rid="B13" ref-type="bibr">13</xref>]. However, according to Arora et al., it is difficult to assess the practical benefits of PRP in maxillary sinus augmentation procedures [<xref rid="B14" ref-type="bibr">14</xref>].</p><p>Previous studies have reported sinus augmentation using PRF in combination with conventional bone substitute. Choukroun et al. reported sinus floor augmentation using PRF in combination with a freeze-dried bone allograft [<xref rid="B15" ref-type="bibr">15</xref>]. In their report, histological evaluations revealed that sufficient new bone formation was observed. Moreover, the mixed graft material could reduce the healing time. In other studies, PRP was added to the bone graft used for sinus augmentation and evaluated histologically. Raghoebar et al. reported no beneficial effect of PRP on wound healing or bone remodeling [<xref rid="B16" ref-type="bibr">16</xref>]. Tanaka et al. demonstrated that increased new bone formation could be found in the histological evaluation of sinus augmentation with deproteinized bovine bone mixed with PRF [<xref rid="B17" ref-type="bibr">17</xref>]. However, these granular materials are associated with increased costs and risk of infection.</p><p>Accordingly, sinus floor elevation using PRF as the sole graft material has been recently introduced. Simonpieri et al. followed up a case of dental implant treatment combined with simultaneous sinus lift with PRF as the sole filling material and demonstrated that stabile new bone formation occurred around the dental implants [<xref rid="B18" ref-type="bibr">18</xref>]. Diss et al. also showed that, in cases with a mean residual alveolar bone height of 6 mm, the implants could function in new bone after 1 year from sinus augmentation with PRF used as the sole filling material [<xref rid="B8" ref-type="bibr">8</xref>]. Furthermore, more severe cases were applied in our previous report, in which PRF was used as the sole material in cases of atrophic maxilla with residual bone height of <5 mm and endosinus bone gain was promoted using the crestal approach in sinus floor elevation [<xref rid="B19" ref-type="bibr">19</xref>]. Additionally, PRF was placed around implants and assessed at about 6 months after surgery using radiography and CT, and the results showed sufficient newly formed bone [<xref rid="B20" ref-type="bibr">20</xref>]. However, thus far, no study has yet conducted a histological examination of PRF as the only graft material after sinus augmentation.</p><p>There are a few reports about histological evaluations of PRF after surgery. Mazor et al. examined histology tissue 6 months after a sinus lift and demonstrated that the tissue was harvested from a lateral window region using a trephine drill [<xref rid="B21" ref-type="bibr">21</xref>]. Biopsies at 6 months after the sinus lift procedure showed a high volume of natural bone with osteoblasts and osteocytes identified easily. However, Case 1 showed bone tissue without osteoblasts. The samples were harvested after a relatively long time had passed since surgery and showed extremely mature bone tissue. In that report, it was not clear whether the regenerating bone closely originated from the implant site or another site.</p><p>In this report, a one-stage protocol in which implants were simultaneously placed with sinus augmentation was employed in Case 1, and a tissue sample was obtained more than two years after the protocol. The sample was harvested from a site that was clearly localized beyond the original sinus floor line; therefore this area was considered to be newly formed bone tissue. On the other hand, a two-stage protocol (sinus augmentation in the first stage and delayed implant placement in the second stage) was employed in Case 2 because the residual bone height in Case 2 was less than 2 mm. Additionally, in the first stage of Case 2, PRF was applied as the sole graft material. To the best of our knowledge, this is the first report using PRF alone in a two-stage protocol of sinus augmentation. Several graft materials have been introduced for the protocol to promote bone regeneration [<xref rid="B4" ref-type="bibr">4</xref>, <xref rid="B22" ref-type="bibr">22</xref>]. In particular, PRF has the ability to release growth factors, such as platelet-derived growth factors and transforming growth factor-beta, and is considered to be a healing biomaterial with great potential for bone regeneration.</p><p>Some reports have argued that graft materials are not necessary during sinus floor elevation [<xref rid="B23" ref-type="bibr">23</xref>–<xref rid="B25" ref-type="bibr">25</xref>]. Nedir et al. suggested that graft materials were not necessary at residual bone heights >4 mm [<xref rid="B26" ref-type="bibr">26</xref>]. However, a long-term evaluation of sinus floor augmentation without graft materials has not yet been conducted. Another crucial factor in the success of sinus augmentation without graft materials is maintaining an elevated Schneiderian membrane. In the one-stage protocol, implant apexes are responsible for maintaining the membrane at an adequate height from the original sinus floor line, such as a tent peg [<xref rid="B27" ref-type="bibr">27</xref>, <xref rid="B28" ref-type="bibr">28</xref>]. Conversely, in the two-stage protocol, graft materials are responsible for maintaining the Schneiderian membrane position. PRF is absorbed gradually; therefore, PRF as the sole filling material without simultaneous implant placement may not be adequate for maintaining the membrane [<xref rid="B20" ref-type="bibr">20</xref>]. However, our findings in the present case report dispute this notion. Indeed, Case 2 demonstrated that PRF clots alone have the capacity for creating space between the original sinus floor and the elevated Schneiderian membrane and the space could be confirming histologically new bone formation. The volume of PRF may be important for maintaining the membrane. Therefore, PRF clots may be considered more favorable than a PRF membrane. Our study describing this case with the two-stage protocol has limitations like short follow-up period. Further studies are therefore needed to obtain stronger evidence to confirm our findings.</p></sec><sec id="sec5"><title>5. Conclusion</title><p>We reported two cases in which PRF used as the sole graft material for sinus augmentation was able to be displaced by new bone. Based on these findings, at 24 months after surgery, the use of PRF alone should be sufficient to maintain natural new bone around protrusion implants into the sinus. The two-stage protocol with PRF only is a safer and simpler technique than the protocol with graft materials mixed with PRF; however, the ability of PRF to form and maintain new bone under the two-stage protocol remains unclear. Although PRF as the sole graft material is useful because it can be easily obtained, is cost-effective, and has the potential to promote natural bone regeneration, further studies with more cases will be required.</p></sec></body><back><sec><title>Ethical Approval</title><p>The clinical procedures were approved by the Ethics Committee of Nagoya City University Hospital, Japan (no. 46-10-0004).</p></sec><sec><title>Competing Interests</title><p>The authors claim to have no financial interests in any company or any of the products mentioned in this paper.</p></sec><ref-list><ref id="B1"><label>1</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Cricchio</surname><given-names>G.</given-names></name><name><surname>Sennerby</surname><given-names>L.</given-names></name><name><surname>Lundgren</surname><given-names>S.</given-names></name></person-group><article-title>Sinus bone formation and implant survival after sinus membrane elevation and implant placement: a 1- to 6-year follow-up study</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2011</year><volume>22</volume><issue>10</issue><fpage>1200</fpage><lpage>1212</lpage><pub-id pub-id-type="doi">10.1111/j.1600-0501.2010.02096.x</pub-id><pub-id pub-id-type="other">2-s2.0-80052665756</pub-id><pub-id pub-id-type="pmid">21906186</pub-id></element-citation></ref><ref id="B2"><label>2</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Boyne</surname><given-names>P. J.</given-names></name><name><surname>James</surname><given-names>R. A.</given-names></name></person-group><article-title>Grafting of the maxillary sinus floor with autogenous marrow and bone</article-title><source><italic>Journal of Oral Surgery</italic></source><year>1980</year><volume>38</volume><issue>8</issue><fpage>613</fpage><lpage>616</lpage><pub-id pub-id-type="other">2-s2.0-0019197813</pub-id><pub-id pub-id-type="pmid">6993637</pub-id></element-citation></ref><ref id="B3"><label>3</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Summers</surname><given-names>R. B.</given-names></name></person-group><article-title>The osteotome technique: part 3. –Less invasive methods of elevating the sinus floor</article-title><source><italic>Compendium</italic></source><year>1994</year><volume>15</volume><issue>6</issue><fpage>698</fpage><lpage>710</lpage><pub-id pub-id-type="other">2-s2.0-19244371416</pub-id><pub-id pub-id-type="pmid">7994726</pub-id></element-citation></ref><ref id="B4"><label>4</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Browaeys</surname><given-names>H.</given-names></name><name><surname>Bouvry</surname><given-names>P.</given-names></name><name><surname>De Bruyn</surname><given-names>H.</given-names></name></person-group><article-title>A literature review on biomaterials in sinus augmentation procedures</article-title><source><italic>Clinical Implant Dentistry and Related Research</italic></source><year>2007</year><volume>9</volume><issue>3</issue><fpage>166</fpage><lpage>177</lpage><pub-id pub-id-type="doi">10.1111/j.1708-8208.2007.00050.x</pub-id><pub-id pub-id-type="other">2-s2.0-34548078711</pub-id><pub-id pub-id-type="pmid">17716261</pub-id></element-citation></ref><ref id="B5"><label>5</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Ali</surname><given-names>S.</given-names></name><name><surname>Bakry</surname><given-names>S. A.</given-names></name><name><surname>Abd-Elhakam</surname><given-names>H.</given-names></name></person-group><article-title>Platelet-rich fibrin in maxillary sinus augmentation: a systematic review</article-title><source><italic>Journal of Oral Implantology</italic></source><year>2015</year><volume>41</volume><issue>6</issue><fpage>746</fpage><lpage>753</lpage><pub-id pub-id-type="doi">10.1563/aaid-joi-d-14-00167</pub-id><pub-id pub-id-type="other">2-s2.0-84949969515</pub-id><pub-id pub-id-type="pmid">25536095</pub-id></element-citation></ref><ref id="B6"><label>6</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Choukroun</surname><given-names>J.</given-names></name><name><surname>Adda</surname><given-names>F.</given-names></name><name><surname>Schoeffler</surname><given-names>C.</given-names></name><name><surname>Vervelle</surname><given-names>A.</given-names></name></person-group><article-title xml:lang="fr">An opportunity in perio-implantology: the PRF</article-title><source><italic>Implantodontie</italic></source><year>2001</year><volume>42</volume><fpage>55</fpage><lpage>62</lpage></element-citation></ref><ref id="B7"><label>7</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Inchingolo</surname><given-names>F.</given-names></name><name><surname>Tatullo</surname><given-names>M.</given-names></name><name><surname>Marrelli</surname><given-names>M.</given-names></name><etal></etal></person-group><article-title>Trial with platelet-rich fibrin and Bio-Oss used as grafting materials in the treatment of the severe maxillar bone atrophy: clinical and radiological evaluations</article-title><source><italic>European Review for Medical and Pharmacological Sciences</italic></source><year>2010</year><volume>14</volume><issue>12</issue><fpage>1075</fpage><lpage>1084</lpage><pub-id pub-id-type="other">2-s2.0-79951845508</pub-id><pub-id pub-id-type="pmid">21375140</pub-id></element-citation></ref><ref id="B8"><label>8</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Diss</surname><given-names>A.</given-names></name><name><surname>Dohan</surname><given-names>D. M.</given-names></name><name><surname>Mouhyi</surname><given-names>J.</given-names></name><name><surname>Mahler</surname><given-names>P.</given-names></name></person-group><article-title>Osteotome sinus floor elevation using Choukroun's platelet-rich fibrin as grafting material: a 1-year prospective pilot study with microthreaded implants</article-title><source><italic>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology</italic></source><year>2008</year><volume>105</volume><issue>5</issue><fpage>572</fpage><lpage>579</lpage><pub-id pub-id-type="doi">10.1016/j.tripleo.2007.08.021</pub-id><pub-id pub-id-type="other">2-s2.0-43049109091</pub-id></element-citation></ref><ref id="B9"><label>9</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Toffler</surname><given-names>M.</given-names></name><name><surname>Toscano</surname><given-names>N.</given-names></name><name><surname>Holtzclaw</surname><given-names>D.</given-names></name></person-group><article-title>Osteotome-mediated sinus floor elevation using only platelet-rich fibrin: an early report on 110 patients</article-title><source><italic>Implant Dentistry</italic></source><year>2010</year><volume>19</volume><issue>5</issue><fpage>447</fpage><lpage>456</lpage><pub-id pub-id-type="doi">10.1097/id.0b013e3181f57288</pub-id><pub-id pub-id-type="other">2-s2.0-77958543112</pub-id><pub-id pub-id-type="pmid">20881816</pub-id></element-citation></ref><ref id="B10"><label>10</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Bielecki</surname><given-names>T. M.</given-names></name><name><surname>Gazdzik</surname><given-names>T. S.</given-names></name><name><surname>Arendt</surname><given-names>J.</given-names></name><name><surname>Szczepanski</surname><given-names>T.</given-names></name><name><surname>Król</surname><given-names>W.</given-names></name><name><surname>Wielkoszynski</surname><given-names>T.</given-names></name></person-group><article-title>Antibacterial effect of autologous platelet gel enriched with growth factors and other active substances</article-title><source><italic>The Journal of Bone & Joint Surgery—British Volume</italic></source><year>2007</year><volume>89</volume><issue>3</issue><fpage>417</fpage><lpage>420</lpage><pub-id pub-id-type="doi">10.1302/0301-620x.89b3.18491</pub-id><pub-id pub-id-type="other">2-s2.0-34147192226</pub-id><pub-id pub-id-type="pmid">17356164</pub-id></element-citation></ref><ref id="B11"><label>11</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Whitman</surname><given-names>D. H.</given-names></name><name><surname>Berry</surname><given-names>R. L.</given-names></name><name><surname>Green</surname><given-names>D. M.</given-names></name></person-group><article-title>Platelet gel: an autologous alternative to fibrin glue with applications in oral and maxillofacial surgery</article-title><source><italic>Journal of Oral and Maxillofacial Surgery</italic></source><year>1997</year><volume>55</volume><issue>11</issue><fpage>1294</fpage><lpage>1299</lpage><pub-id pub-id-type="doi">10.1016/s0278-2391(97)90187-7</pub-id><pub-id pub-id-type="other">2-s2.0-0030666361</pub-id><pub-id pub-id-type="pmid">9371122</pub-id></element-citation></ref><ref id="B12"><label>12</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Yilmaz</surname><given-names>D.</given-names></name><name><surname>Dogan</surname><given-names>N.</given-names></name><name><surname>Ozkan</surname><given-names>A.</given-names></name><name><surname>Sencimen</surname><given-names>M.</given-names></name><name><surname>Ora</surname><given-names>B. E.</given-names></name><name><surname>Mutlu</surname><given-names>I.</given-names></name></person-group><article-title>Effect of platelet rich fibrin and beta tricalcium phosphate on bone healing. A histological study in pigs</article-title><source><italic>Acta Cirurgica Brasileira</italic></source><year>2014</year><volume>29</volume><issue>1</issue><fpage>59</fpage><lpage>65</lpage><pub-id pub-id-type="doi">10.1590/s0102-86502014000100009</pub-id><pub-id pub-id-type="other">2-s2.0-84892607402</pub-id><pub-id pub-id-type="pmid">24474179</pub-id></element-citation></ref><ref id="B13"><label>13</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>He</surname><given-names>L.</given-names></name><name><surname>Lin</surname><given-names>Y.</given-names></name><name><surname>Hu</surname><given-names>X.</given-names></name><name><surname>Zhang</surname><given-names>Y.</given-names></name><name><surname>Wu</surname><given-names>H.</given-names></name></person-group><article-title>A comparative study of platelet-rich fibrin (PRF) and platelet-rich plasma (PRP) on the effect of proliferation and differentiation of rat osteoblasts in vitro</article-title><source><italic>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology</italic></source><year>2009</year><volume>108</volume><issue>5</issue><fpage>707</fpage><lpage>713</lpage><pub-id pub-id-type="doi">10.1016/j.tripleo.2009.06.044</pub-id><pub-id pub-id-type="other">2-s2.0-72049123768</pub-id></element-citation></ref><ref id="B14"><label>14</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Arora</surname><given-names>N. S.</given-names></name><name><surname>Ramanayake</surname><given-names>T.</given-names></name><name><surname>Ren</surname><given-names>Y.-F.</given-names></name><name><surname>Romanos</surname><given-names>G. E.</given-names></name></person-group><article-title>Platelet-rich plasma in sinus augmentation procedures: a systematic literature review—part II</article-title><source><italic>Implant Dentistry</italic></source><year>2010</year><volume>19</volume><issue>2</issue><fpage>145</fpage><lpage>157</lpage><pub-id pub-id-type="doi">10.1097/id.0b013e3181cd706d</pub-id><pub-id pub-id-type="other">2-s2.0-77951045567</pub-id><pub-id pub-id-type="pmid">20386218</pub-id></element-citation></ref><ref id="B15"><label>15</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Choukroun</surname><given-names>J.</given-names></name><name><surname>Diss</surname><given-names>A.</given-names></name><name><surname>Simonpieri</surname><given-names>A.</given-names></name><etal></etal></person-group><article-title>Platelet-rich fibrin (PRF): a second-generation platelet concentrate. Part V: histologic evaluations of PRF effects on bone allograft maturation in sinus lift</article-title><source><italic>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology</italic></source><year>2006</year><volume>101</volume><issue>3</issue><fpage>299</fpage><lpage>303</lpage><pub-id pub-id-type="doi">10.1016/j.tripleo.2005.07.012</pub-id><pub-id pub-id-type="other">2-s2.0-33644535189</pub-id></element-citation></ref><ref id="B16"><label>16</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Raghoebar</surname><given-names>G. M.</given-names></name><name><surname>Schortinghuis</surname><given-names>J.</given-names></name><name><surname>Liem</surname><given-names>R. S. B.</given-names></name><name><surname>Ruben</surname><given-names>J. L.</given-names></name><name><surname>Van Der Wal</surname><given-names>J. E.</given-names></name><name><surname>Vissink</surname><given-names>A.</given-names></name></person-group><article-title>Does platelet-rich plasma promote remodeling of autologous bone grafts used for augmentation of the maxillary sinus floor?</article-title><source><italic>Clinical Implant Dentistry and Related Reseach</italic></source><year>2005</year><volume>16</volume><issue>3</issue><fpage>349</fpage><lpage>356</lpage><pub-id pub-id-type="doi">10.1111/j.1600-0501.2005.01115.x</pub-id></element-citation></ref><ref id="B17"><label>17</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Tanaka</surname><given-names>H.</given-names></name><name><surname>Toyoshima</surname><given-names>T.</given-names></name><name><surname>Atsuta</surname><given-names>I.</given-names></name><etal></etal></person-group><article-title>Additional effects of platelet-rich fibrin on bone regeneration in sinus augmentation with deproteinized bovine bone mineral: preliminary results</article-title><source><italic>Implant Dentistry</italic></source><year>2015</year><volume>24</volume><issue>6</issue><fpage>669</fpage><lpage>674</lpage><pub-id pub-id-type="doi">10.1097/id.0000000000000306</pub-id><pub-id pub-id-type="other">2-s2.0-84948711035</pub-id><pub-id pub-id-type="pmid">26204169</pub-id></element-citation></ref><ref id="B18"><label>18</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Simonpieri</surname><given-names>A.</given-names></name><name><surname>Choukroun</surname><given-names>J.</given-names></name><name><surname>Corso</surname><given-names>M. D.</given-names></name><name><surname>Sammartino</surname><given-names>G.</given-names></name><name><surname>Ehrenfest</surname><given-names>D. M. D.</given-names></name></person-group><article-title>Simultaneous sinus-lift and implantation using microthreaded implants and leukocyte- and platelet-rich fibrin as sole grafting material: a six-year experience</article-title><source><italic>Implant Dentistry</italic></source><year>2011</year><volume>20</volume><issue>1</issue><fpage>2</fpage><lpage>12</lpage><pub-id pub-id-type="doi">10.1097/id.0b013e3181faa8af</pub-id><pub-id pub-id-type="other">2-s2.0-79951650605</pub-id><pub-id pub-id-type="pmid">21278521</pub-id></element-citation></ref><ref id="B19"><label>19</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kanayama</surname><given-names>T.</given-names></name><name><surname>Horii</surname><given-names>K.</given-names></name><name><surname>Senga</surname><given-names>Y.</given-names></name><name><surname>Shibuya</surname><given-names>Y.</given-names></name></person-group><article-title>Crestal approach to sinus floor elevation for atrophic maxilla using platelet-rich fibrin as the only grafting material: a 1-year prospective study</article-title><source><italic>Implant Dentistry</italic></source><year>2016</year><volume>25</volume><issue>1</issue><fpage>32</fpage><lpage>38</lpage><pub-id pub-id-type="doi">10.1097/id.0000000000000327</pub-id><pub-id pub-id-type="other">2-s2.0-84956922862</pub-id><pub-id pub-id-type="pmid">26384097</pub-id></element-citation></ref><ref id="B20"><label>20</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Tajima</surname><given-names>N.</given-names></name><name><surname>Ohba</surname><given-names>S.</given-names></name><name><surname>Sawase</surname><given-names>T.</given-names></name><name><surname>Asahina</surname><given-names>I.</given-names></name></person-group><article-title>Evaluation of sinus floor augmentation with simultaneous implant placement using platelet-rich fibrin as sole grafting material</article-title><source><italic>The International Journal of Oral & Maxillofacial Implants</italic></source><year>2013</year><volume>28</volume><issue>1</issue><fpage>77</fpage><lpage>83</lpage><pub-id pub-id-type="doi">10.11607/jomi.2613</pub-id><pub-id pub-id-type="other">2-s2.0-84893368380</pub-id><pub-id pub-id-type="pmid">23377050</pub-id></element-citation></ref><ref id="B21"><label>21</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Mazor</surname><given-names>Z.</given-names></name><name><surname>Horowitz</surname><given-names>R. A.</given-names></name><name><surname>Del Corso</surname><given-names>M.</given-names></name><name><surname>Prasad</surname><given-names>H. S.</given-names></name><name><surname>Rohrer</surname><given-names>M. D.</given-names></name><name><surname>Ehrenfest</surname><given-names>D. M. D.</given-names></name></person-group><article-title>Sinus floor augmentation with simultaneous implant placement using Choukroun's platelet-rich fibrin as the sole grafting material: a radiologic and histologic study at 6 months</article-title><source><italic>Journal of Periodontology</italic></source><year>2009</year><volume>80</volume><issue>12</issue><fpage>2056</fpage><lpage>2064</lpage><pub-id pub-id-type="doi">10.1902/jop.2009.090252</pub-id><pub-id pub-id-type="other">2-s2.0-72749109620</pub-id><pub-id pub-id-type="pmid">19961389</pub-id></element-citation></ref><ref id="B22"><label>22</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kim</surname><given-names>Y.-K.</given-names></name><name><surname>Yun</surname><given-names>P.-Y.</given-names></name><name><surname>Kim</surname><given-names>S.-G.</given-names></name><name><surname>Lim</surname><given-names>S.-C.</given-names></name></person-group><article-title>Analysis of the healing process in sinus bone grafting using various grafting materials</article-title><source><italic>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology</italic></source><year>2009</year><volume>107</volume><issue>2</issue><fpage>204</fpage><lpage>211</lpage><pub-id pub-id-type="doi">10.1016/j.tripleo.2008.07.021</pub-id><pub-id pub-id-type="other">2-s2.0-58149277528</pub-id></element-citation></ref><ref id="B23"><label>23</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Pinchasov</surname><given-names>G.</given-names></name><name><surname>Juodzbalys</surname><given-names>G.</given-names></name></person-group><article-title>Graft-free sinus augmentation procedure: a literature review</article-title><source><italic>Journal of Oral and Maxillofacial Research</italic></source><year>2014</year><volume>5</volume><issue>1:e1</issue><fpage>1</fpage><lpage>9</lpage><pub-id pub-id-type="doi">10.5037/jomr.2014.5101</pub-id></element-citation></ref><ref id="B24"><label>24</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Si</surname><given-names>M.-S.</given-names></name><name><surname>Shou</surname><given-names>Y.-W.</given-names></name><name><surname>Shi</surname><given-names>Y.-T.</given-names></name><name><surname>Yang</surname><given-names>G.-L.</given-names></name><name><surname>Wang</surname><given-names>H.-M.</given-names></name><name><surname>He</surname><given-names>F.-M.</given-names></name></person-group><article-title>Long-term outcomes of osteotome sinus floor elevation without bone grafts: a clinical retrospective study of 4–9 years</article-title><source><italic>Clinical Oral Implants Research</italic></source><year>2016</year><pub-id pub-id-type="doi">10.1111/clr.12752</pub-id><pub-id pub-id-type="other">2-s2.0-84954525985</pub-id></element-citation></ref><ref id="B25"><label>25</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Riben</surname><given-names>C.</given-names></name><name><surname>Thor</surname><given-names>A.</given-names></name></person-group><article-title>The maxillary sinus membrane elevation procedure: augmentation of bone around dental implants without grafts—a review of a surgical technique</article-title><source><italic>International Journal of Dentistry</italic></source><year>2012</year><volume>2012</volume><fpage>9</fpage><pub-id pub-id-type="publisher-id">105483</pub-id><pub-id pub-id-type="doi">10.1155/2012/105483</pub-id><pub-id pub-id-type="other">2-s2.0-84863667189</pub-id></element-citation></ref><ref id="B26"><label>26</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Nedir</surname><given-names>R.</given-names></name><name><surname>Nurdin</surname><given-names>N.</given-names></name><name><surname>Khoury</surname><given-names>P.</given-names></name><name><surname>Bischof</surname><given-names>M.</given-names></name></person-group><article-title>Short implants placed with or without grafting in atrophic sinuses: the 3-year results of a prospective randomized controlled study</article-title><source><italic>Clinical Implant Dentistry and Related Research</italic></source><year>2016</year><volume>18</volume><issue>1</issue><fpage>10</fpage><lpage>18</lpage><pub-id pub-id-type="doi">10.1111/cid.12279</pub-id><pub-id pub-id-type="other">2-s2.0-84956792155</pub-id><pub-id pub-id-type="pmid">25622803</pub-id></element-citation></ref><ref id="B27"><label>27</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Dohan</surname><given-names>D. M.</given-names></name><name><surname>Choukroun</surname><given-names>J.</given-names></name><name><surname>Diss</surname><given-names>A.</given-names></name><etal></etal></person-group><article-title>Platelet-rich fibrin (PRF): a second-generation platelet concentrate. Part I: technological concepts and evolution</article-title><source><italic>Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology</italic></source><year>2006</year><volume>101</volume><issue>3</issue><fpage>e37</fpage><lpage>e44</lpage><pub-id pub-id-type="doi">10.1016/j.tripleo.2005.07.008</pub-id><pub-id pub-id-type="other">2-s2.0-33644557480</pub-id></element-citation></ref><ref id="B28"><label>28</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Kumar</surname><given-names>V. R.</given-names></name><name><surname>Gangadharan</surname><given-names>G.</given-names></name></person-group><article-title>Platelet rich fibrin in dentistry: a review of literature</article-title><source><italic>International Journal of Medicine</italic></source><year>2015</year><volume>3</volume><issue>2</issue><fpage>72</fpage><lpage>76</lpage><pub-id pub-id-type="doi">10.14419/ijm.v3i2.5079</pub-id></element-citation></ref></ref-list></back><floats-group><fig id="fig1" orientation="portrait" position="float"><label>Figure 1</label><caption><p>A panoramic radiograph reveals the residual bone height to be low at the first molar site.</p></caption><graphic xlink:href="CRID2016-2654645.001"></graphic></fig><fig id="fig2" orientation="portrait" position="float"><label>Figure 2</label><caption><p>CT scans were performed and showed the implant (site 16). (a) A preoperative image shows the residual bone height is approximately 2 mm. (b) Six months after surgery, the original sinus floor was confirmed. Furthermore, gradually increasing radiopacity was observed around the implant up to the apex, which is the elevated site using PRF only. (c) One year after surgery, the original sinus floor is unclear and radiopacity around the implant increased.</p></caption><graphic xlink:href="CRID2016-2654645.002"></graphic></fig><fig id="fig3" orientation="portrait" position="float"><label>Figure 3</label><caption><p>A biopsy was harvested from the red dot, which indicates the site of newly formed tissue (Case 1).</p></caption><graphic xlink:href="CRID2016-2654645.003"></graphic></fig><fig id="fig4" orientation="portrait" position="float"><label>Figure 4</label><caption><p>The initial panoramic radiograph revealed severe bone loss around R3 and L2 implants.</p></caption><graphic xlink:href="CRID2016-2654645.004"></graphic></fig><fig id="fig5" orientation="portrait" position="float"><label>Figure 5</label><caption><p>The preoperative CT scan showed insufficient residual height in the right posterior area (Case 2).</p></caption><graphic xlink:href="CRID2016-2654645.005"></graphic></fig><fig id="fig6" orientation="portrait" position="float"><label>Figure 6</label><caption><p>Sinus augmentation using the lateral window technique. (a) PRF clots were filled inside the sinus cavity and (b) the PRF membrane was used to cover the osteotomy window. (c) A CT image taken immediately after sinus augmentation using PRF only.</p></caption><graphic xlink:href="CRID2016-2654645.006"></graphic></fig><fig id="fig7" orientation="portrait" position="float"><label>Figure 7</label><caption><p>CT scan 8 months after sinus augmentation in the first stage showed that radiopacity around the implant increased.</p></caption><graphic xlink:href="CRID2016-2654645.007"></graphic></fig><fig id="fig8" orientation="portrait" position="float"><label>Figure 8</label><caption><p>Histological examination in higher magnification of a sample harvested 24 months after surgery using PRF only shows extremely mature bone tissue (H-E staining).</p></caption><graphic xlink:href="CRID2016-2654645.008"></graphic></fig><fig id="fig9" orientation="portrait" position="float"><label>Figure 9</label><caption><p>Under high magnification, newly formed lamellar bone surrounding the woven bone was confirmed (toluidine blue staining).</p></caption><graphic xlink:href="CRID2016-2654645.009"></graphic></fig></floats-group></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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