Bifid mandibular canal: confirmation of limited cone beam CT findings by gross anatomical and histological investigations

The aims of this study were (1) to assess the validity of limited cone beam CT (CBCT) in detecting the distribution of bifid mandibular canals in the retromolar region by comparing its findings with those of panoramic radiography and spiral CT imaging, and (2) to confirm the contents of such canals...

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Bibliographic Details
Published in:Dento-maxillo-facial radiology 2012-09, Vol.41 (6), p.460-465
Main Authors: Fukami, K, Shiozaki, K, Mishima, A, Kuribayashi, A, Hamada, Y, Kobayashi, K
Format: Article
Language:English
Subjects:
Cadaver
Cone-Beam Computed Tomography
Dentistry
Humans
Mandible - anatomy & histology
Mandible - diagnostic imaging
Radiography, Panoramic
Tomography, Spiral Computed
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Summary:The aims of this study were (1) to assess the validity of limited cone beam CT (CBCT) in detecting the distribution of bifid mandibular canals in the retromolar region by comparing its findings with those of panoramic radiography and spiral CT imaging, and (2) to confirm the contents of such canals depicted on limited CBCT images by using gross anatomical and histological methods. Bilateral bifid mandibular canals of a Japanese cadaver were investigated. The canals depicted on panoramic radiography, spiral CT and limited CBCT images were compared. Cross-sectional limited CBCT images of these canals were compared with gross anatomical sections of the mandible and their contents were confirmed histologically. The spiral CT and limited CBCT images showed the bilateral bifid mandibular canals in the retromolar region whereas the panoramic radiographs indicated the presence of only the left bifid mandibular canal. The canal distribution was more distinct in the limited CBCT images than in the spiral CT images and the cross-sectional limited CBCT images were consistent with the gross anatomical sections. Histologically, the canals contained several nerve bundles and arteries among which the largest nerve and artery were of a similar size. Limited CBCT is valuable for assessing the distribution of bifid mandibular canals. It is clinically significant to accurately localize a bifid mandibular canal of the retromolar region because it contains a nerve bundle and artery.
ISSN:0250-832X
1476-542X
DOI:10.1259/dmfr/60245722