Accuracy and reliability of linear measurements using tangential projection and cone beam computed tomography
Identifieur interne : 001477 ( Main/Merge ); précédent : 001476; suivant : 001478Accuracy and reliability of linear measurements using tangential projection and cone beam computed tomography
Auteurs : Mahnaz Sheikhi [Iran] ; Mansour Dakhil-Alian [Iran] ; Zahra Bahreinian [Iran]Source :
- Dental Research Journal [ 1735-3327 ] ; 2015.
Abstract
Providing a cross-sectional image is essential for preimplant assessments. Computed tomography (CT) and cone beam CT (CBCT) images are very expensive and provide high radiation dose. Tangential projection is a very simple, available, and low-dose technique that can be used in the anterior portion of mandible. The purpose of this study was to evaluate the accuracy of tangential projection in preimplant measurements in comparison to CBCT.
Three dry edentulous human mandibles were examined in five points at intercanine region using tangential projection and CBCT. The height and width of the ridge were measured twice by two observers. The mandibles were then cut, and real measurements were obtained. The agreement between real measures and measurements obtained by either technique, and inter- and intra-observer reliability were tested.
The measurement error was less than 0.12 for tangential technique and 0.06 for CBCT. The agreement between the real measures and measurements from radiographs were higher than 0.87. Tangential projection slightly overestimated the distances, while there was a slight underestimation in CBCT results.
Considering the low cost, low radiation dose, simplicity and availability, tangenital projection would be adequate for preimplant assessment in edentulous patients when limited numbers of implants are required in the anterior mandible.
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PubMed: 26005469
PubMed Central: 4432612
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id="aff2">Dental Implant Research Center and Department of Prosthodontics, Isfahan university of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Dental Implant Research Center and Department of Prosthodontics, Isfahan university of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author><author><name sortKey="Bahreinian, Zahra" sort="Bahreinian, Zahra" uniqKey="Bahreinian Z" first="Zahra" last="Bahreinian">Zahra Bahreinian</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, 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M:accuracy:and:reliability</idno><idno type="wicri:Area/Main/Merge">001477</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Accuracy and reliability of linear measurements using tangential projection and cone beam computed tomography</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">Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author><author><name sortKey="Dakhil Alian, Mansour" sort="Dakhil Alian, Mansour" uniqKey="Dakhil Alian M" first="Mansour" last="Dakhil-Alian">Mansour Dakhil-Alian</name><affiliation wicri:level="1"><nlm:aff id="aff2">Dental Implant Research Center and Department of Prosthodontics, Isfahan university of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Dental Implant Research Center and Department of Prosthodontics, Isfahan university of Medical Sciences, Isfahan</wicri:regionArea><wicri:noRegion>Isfahan</wicri:noRegion></affiliation></author><author><name sortKey="Bahreinian, Zahra" sort="Bahreinian, Zahra" uniqKey="Bahreinian Z" first="Zahra" last="Bahreinian">Zahra Bahreinian</name><affiliation wicri:level="1"><nlm:aff id="aff1">Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, Isfahan, Iran</nlm:aff><country xml:lang="fr">Iran</country><wicri:regionArea>Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, 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="2015">2015</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>Providing a cross-sectional image is essential for preimplant assessments. Computed tomography (CT) and cone beam CT (CBCT) images are very expensive and provide high radiation dose. Tangential projection is a very simple, available, and low-dose technique that can be used in the anterior portion of mandible. The purpose of this study was to evaluate the accuracy of tangential projection in preimplant measurements in comparison to CBCT.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>Three dry edentulous human mandibles were examined in five points at intercanine region using tangential projection and CBCT. The height and width of the ridge were measured twice by two observers. The mandibles were then cut, and real measurements were obtained. The agreement between real measures and measurements obtained by either technique, and inter- and intra-observer reliability were tested.</p></sec><sec id="st3"><title>Results:</title><p>The measurement error was less than 0.12 for tangential technique and 0.06 for CBCT. The agreement between the real measures and measurements from radiographs were higher than 0.87. Tangential projection slightly overestimated the distances, while there was a slight underestimation in CBCT results.</p></sec><sec id="st4"><title>Conclusion:</title><p>Considering the low cost, low radiation dose, simplicity and availability, tangenital projection would be adequate for preimplant assessment in edentulous patients when limited numbers of implants are required in the anterior mandible.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Loubele, M" uniqKey="Loubele M">M Loubele</name></author><author><name sortKey="Van Assche, N" uniqKey="Van Assche N">N Van Assche</name></author><author><name sortKey="Carpentier, K" uniqKey="Carpentier K">K Carpentier</name></author><author><name sortKey="Maes, F" uniqKey="Maes F">F Maes</name></author><author><name sortKey="Jacobs, R" uniqKey="Jacobs R">R Jacobs</name></author><author><name sortKey="Van Steenberghe, D" uniqKey="Van Steenberghe D">D van 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