Accuracy and reliability of linear measurements using tangential projection and cone beam computed tomography
Identifieur interne : 000274 ( Pmc/Curation ); précédent : 000273; suivant : 000275Accuracy 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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<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>
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<author><name sortKey="Dakhil Alian, Mansour" sort="Dakhil Alian, Mansour" uniqKey="Dakhil Alian M" first="Mansour" last="Dakhil-Alian">Mansour Dakhil-Alian</name>
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<author><name sortKey="Bahreinian, Zahra" sort="Bahreinian, Zahra" uniqKey="Bahreinian Z" first="Zahra" last="Bahreinian">Zahra Bahreinian</name>
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<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>
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<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>
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<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>
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<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>
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<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>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Dent Res J (Isfahan)</journal-id>
<journal-id journal-id-type="iso-abbrev">Dent Res J (Isfahan)</journal-id>
<journal-id journal-id-type="publisher-id">DRJ</journal-id>
<journal-title-group><journal-title>Dental Research Journal</journal-title>
</journal-title-group>
<issn pub-type="ppub">1735-3327</issn>
<issn pub-type="epub">2008-0255</issn>
<publisher><publisher-name>Medknow Publications & Media Pvt Ltd</publisher-name>
<publisher-loc>India</publisher-loc>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">26005469</article-id>
<article-id pub-id-type="pmc">4432612</article-id>
<article-id pub-id-type="publisher-id">DRJ-12-271</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject>
</subj-group>
</article-categories>
<title-group><article-title>Accuracy and reliability of linear measurements using tangential projection and cone beam computed tomography</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Sheikhi</surname>
<given-names>Mahnaz</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Dakhil-Alian</surname>
<given-names>Mansour</given-names>
</name>
<xref ref-type="aff" rid="aff2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Bahreinian</surname>
<given-names>Zahra</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
<xref ref-type="corresp" rid="cor1"></xref>
</contrib>
</contrib-group>
<aff id="aff1"><label>1</label>
Torabinejad Dental Research Center and Department of Oral and Maxillofacial Radiology, Isfahan university of Medical Sciences, Isfahan, Iran</aff>
<aff id="aff2"><label>2</label>
Dental Implant Research Center and Department of Prosthodontics, Isfahan university of Medical Sciences, Isfahan, Iran</aff>
<author-notes><corresp id="cor1"><bold>Address for correspondence:</bold>
Dr. Zahra Bahreinian, Torabinejad Dental Research Center and Departments of Oral and Maxillofacial Radiology, School of Dentistry, Isfahan University of Medical Science, Isfahan 8174673461, Iran. <bold>E-mail:</bold>
<email xlink:href="zahra.bahreinian@gmail.com">zahra.bahreinian@gmail.com</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><season>May-Jun</season>
<year>2015</year>
</pub-date>
<volume>12</volume>
<issue>3</issue>
<fpage>271</fpage>
<lpage>277</lpage>
<history><date date-type="received"><month>10</month>
<year>2013</year>
</date>
<date date-type="accepted"><month>1</month>
<year>2015</year>
</date>
</history>
<permissions><copyright-statement>Copyright: © Dental Research Journal</copyright-statement>
<copyright-year>2015</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-sa/3.0"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<abstract><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>
</abstract>
<kwd-group><kwd>Cone beam computed tomography</kwd>
<kwd>dental implants</kwd>
<kwd>radiography</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>
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