The effect of mandibular buccal tilting on the accuracy of posterior mandibular spiral tomographic images: An in vitro study
Identifieur interne : 004457 ( Ncbi/Checkpoint ); précédent : 004456; suivant : 004458The effect of mandibular buccal tilting on the accuracy of posterior mandibular spiral tomographic images: An in vitro study
Auteurs : Mahnaz Sheikhi [Iran] ; Vida Maleki [Iran]Source :
- Dental Research Journal [ 1735-3327 ] ; 2011.
Abstract
Accurate measurement of the height and buccolingual thickness of available bone has a significant role in dental implantology. The shadow of ramus on the mandibular second molar region disturbs the sharpness of conventional tomographic images. The aim of this study was to evaluate the effect of transferring the shadow of ramus from the center of the focal plane, by changing the position of mandible, on the sharpness of the posterior mandibular region.
In this experimental study, we used 10 dry human mandibles. Three metal balls were mounted on the midline and mandibular second molar regions bilaterally. Standard panoramic and tomographic images were taken. Then, the mandible was tilted buccaly for 8° – compensating the normal lingual inclination of the mandibular ridge and teeth on this region – and tomographic images were taken again. The height and thickness of bone were measured on the images and then compared with the real amounts measured directly on mandibles. Also, the sharpness of mandibular canals was compared between the two tomographic methods. Findings were analyzed with repeated measured ANOVA test (
The height of mandibular bone, on the images of the tilted tomography technique was more accurate compared to standard (
Buccal tilting is recommended when measuring the bone height is more important, but routine standard tomography is preferred when the thickness is requested.
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PubMed: 23372586
PubMed Central: 3556287
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">The effect of mandibular buccal tilting on the accuracy of posterior mandibular spiral tomographic images: An <italic>in vitro</italic> study</title><author><name sortKey="Sheikhi, Mahnaz" sort="Sheikhi, Mahnaz" uniqKey="Sheikhi M" first="Mahnaz" last="Sheikhi">Mahnaz Sheikhi</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author><author><name sortKey="Maleki, Vida" sort="Maleki, Vida" uniqKey="Maleki V" first="Vida" last="Maleki">Vida Maleki</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">23372586</idno><idno type="pmc">3556287</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3556287</idno><idno type="RBID">PMC:3556287</idno><date when="2011">2011</date><idno type="wicri:Area/Pmc/Corpus">002B61</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002B61</idno><idno type="wicri:Area/Pmc/Curation">002B61</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">002B61</idno><idno type="wicri:Area/Pmc/Checkpoint">002056</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">002056</idno><idno type="wicri:Area/Ncbi/Merge">004457</idno><idno type="wicri:Area/Ncbi/Curation">004457</idno><idno type="wicri:Area/Ncbi/Checkpoint">004457</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">The effect of mandibular buccal tilting on the accuracy of posterior mandibular spiral tomographic images: An <italic>in vitro</italic> study</title><author><name sortKey="Sheikhi, Mahnaz" sort="Sheikhi, Mahnaz" uniqKey="Sheikhi M" first="Mahnaz" last="Sheikhi">Mahnaz Sheikhi</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author><author><name sortKey="Maleki, Vida" sort="Maleki, Vida" uniqKey="Maleki V" first="Vida" last="Maleki">Vida Maleki</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinenejad Dental Research Center and Department of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author></analytic><series><title level="j">Dental Research Journal</title><idno type="ISSN">1735-3327</idno><idno type="eISSN">2008-0255</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="st1"><title>Background:</title><p>Accurate measurement of the height and buccolingual thickness of available bone has a significant role in dental implantology. The shadow of ramus on the mandibular second molar region disturbs the sharpness of conventional tomographic images. The aim of this study was to evaluate the effect of transferring the shadow of ramus from the center of the focal plane, by changing the position of mandible, on the sharpness of the posterior mandibular region.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>In this experimental study, we used 10 dry human mandibles. Three metal balls were mounted on the midline and mandibular second molar regions bilaterally. Standard panoramic and tomographic images were taken. Then, the mandible was tilted buccaly for 8° – compensating the normal lingual inclination of the mandibular ridge and teeth on this region – and tomographic images were taken again. The height and thickness of bone were measured on the images and then compared with the real amounts measured directly on mandibles. Also, the sharpness of mandibular canals was compared between the two tomographic methods. Findings were analyzed with repeated measured ANOVA test (<italic>P</italic><0.05).</p></sec><sec id="st3"><title>Results:</title><p>The height of mandibular bone, on the images of the tilted tomography technique was more accurate compared to standard (<italic>P</italic><0.001), but standard tomography had more accuracy in estimating the buccolingual thickness at the half-height point. Regarding the sharpness of mandibular canals, we found no significant differences between two tomographic methods.</p></sec><sec id="st4"><title>Conclusion:</title><p>Buccal tilting is recommended when measuring the bone height is more important, but routine standard tomography is preferred when the thickness is requested.</p></sec></div></front><back><div1 type="bibliography"><listBibl><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="Bhat, S" uniqKey="Bhat S">S Bhat</name></author><author><name sortKey="Shenoy, K" uniqKey="Shenoy K">K Shenoy</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Mupparapu, M" uniqKey="Mupparapu M">M Mupparapu</name></author><author><name sortKey="Singer, Sr" uniqKey="Singer S">SR 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