Reproducibility of 3 Different Tracing Methods Based on Cone Beam Computed Tomography in Determining the Anatomical Position of the Mandibular Canal
Identifieur interne : 005515 ( Main/Exploration ); précédent : 005514; suivant : 005516Reproducibility of 3 Different Tracing Methods Based on Cone Beam Computed Tomography in Determining the Anatomical Position of the Mandibular Canal
Auteurs : Niek L. Gerlach [Pays-Bas] ; Gert J. Meijer [Pays-Bas] ; Thomas J. J. Maal [Pays-Bas] ; Jan Mulder [Pays-Bas] ; Frits A. Rangel [Pays-Bas] ; Wilfred A. Borstlap [Pays-Bas] ; Stefaan J. Berge [Pays-Bas]Source :
- Journal of oral and maxillofacial surgery [ 0278-2391 ] ; 2010.
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- Pascal (Inist)
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Abstract
Purpose: To investigate the reproducibility of 3 different tracing methods to determine a reliable method to define the proper anatomical position of the mandibular canal based on cone beam computed tomography (CBCT) data. Materials and Methods: Five dentate and 5 edentate patients were selected at random from the CBCT database. Two independent observers traced both the left and the right mandibular canal using 3-dimensional image-based planning software (Procera System NobelGuide; Nobel Biocare, Göteborg, Sweden). All mandibular canals were traced using 3 different methods. Method I was based on coronal views, also known as cross-sections. Panorama-like reconstructions were the starting point for method II. The third method combined methods I and II. Results: With respect to interobserver reliability, no significant difference (P = .34) for the various methods was observed. The reproducibility was better in edentate than in dentate jaws (P = .0015). The difference between 2 tracings was the lowest for the combined method: within a range of 1.3 mm in 95% of the course of the canal. The most obvious deviations were mainly seen in the anterior part of the canal. Conclusions: The best reproducible method for mandibular canal tracing is the combined method III. Between observers, still a mean 95th percentile deviation threshold of 1.3 mm (SD 0.384) is noted, indicating that a safety zone of 1.7 mm should be respected. When planning surgery on CBCT-based data, surgeons should be aware of the obvious deviations located in the region of the anterior loop of the canal.
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<series><title level="j" type="main">Journal of oral and maxillofacial surgery</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anatomy</term>
<term>Computerized axial tomography</term>
<term>Mandible</term>
<term>Method</term>
<term>Position</term>
<term>Reproducibility</term>
<term>Stomatology</term>
<term>Surgery</term>
<term>Tracing</term>
<term>Treatment</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Tomodensitométrie</term>
<term>Chirurgie</term>
<term>Reproductibilité</term>
<term>Traçage</term>
<term>Méthode</term>
<term>Anatomie</term>
<term>Position</term>
<term>Mandibule</term>
<term>Stomatologie</term>
<term>Traitement</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Chirurgie</term>
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<front><div type="abstract" xml:lang="en">Purpose: To investigate the reproducibility of 3 different tracing methods to determine a reliable method to define the proper anatomical position of the mandibular canal based on cone beam computed tomography (CBCT) data. Materials and Methods: Five dentate and 5 edentate patients were selected at random from the CBCT database. Two independent observers traced both the left and the right mandibular canal using 3-dimensional image-based planning software (Procera System NobelGuide; Nobel Biocare, Göteborg, Sweden). All mandibular canals were traced using 3 different methods. Method I was based on coronal views, also known as cross-sections. Panorama-like reconstructions were the starting point for method II. The third method combined methods I and II. Results: With respect to interobserver reliability, no significant difference (P = .34) for the various methods was observed. The reproducibility was better in edentate than in dentate jaws (P = .0015). The difference between 2 tracings was the lowest for the combined method: within a range of 1.3 mm in 95% of the course of the canal. The most obvious deviations were mainly seen in the anterior part of the canal. Conclusions: The best reproducible method for mandibular canal tracing is the combined method III. Between observers, still a mean 95th percentile deviation threshold of 1.3 mm (SD 0.384) is noted, indicating that a safety zone of 1.7 mm should be respected. When planning surgery on CBCT-based data, surgeons should be aware of the obvious deviations located in the region of the anterior loop of the canal.</div>
</front>
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<tree><country name="Pays-Bas"><region name="Gueldre"><name sortKey="Gerlach, Niek L" sort="Gerlach, Niek L" uniqKey="Gerlach N" first="Niek L." last="Gerlach">Niek L. Gerlach</name>
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<name sortKey="Berge, Stefaan J" sort="Berge, Stefaan J" uniqKey="Berge S" first="Stefaan J." last="Berge">Stefaan J. Berge</name>
<name sortKey="Borstlap, Wilfred A" sort="Borstlap, Wilfred A" uniqKey="Borstlap W" first="Wilfred A." last="Borstlap">Wilfred A. Borstlap</name>
<name sortKey="Borstlap, Wilfred A" sort="Borstlap, Wilfred A" uniqKey="Borstlap W" first="Wilfred A." last="Borstlap">Wilfred A. Borstlap</name>
<name sortKey="Gerlach, Niek L" sort="Gerlach, Niek L" uniqKey="Gerlach N" first="Niek L." last="Gerlach">Niek L. Gerlach</name>
<name sortKey="Maal, Thomas J J" sort="Maal, Thomas J J" uniqKey="Maal T" first="Thomas J. J." last="Maal">Thomas J. J. Maal</name>
<name sortKey="Meijer, Gert J" sort="Meijer, Gert J" uniqKey="Meijer G" first="Gert J." last="Meijer">Gert J. Meijer</name>
<name sortKey="Mulder, Jan" sort="Mulder, Jan" uniqKey="Mulder J" first="Jan" last="Mulder">Jan Mulder</name>
<name sortKey="Rangel, Frits A" sort="Rangel, Frits A" uniqKey="Rangel F" first="Frits A." last="Rangel">Frits A. Rangel</name>
<name sortKey="Rangel, Frits A" sort="Rangel, Frits A" uniqKey="Rangel F" first="Frits A." last="Rangel">Frits A. Rangel</name>
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