下顎智歯部の頬舌的断層X線像における下顎管の画像解析

概要

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This study evaluated of the mandibular canal at the wisdom tooth position by cross-sectional spiral tomography in 50 subjects. The location of the mandibular canals identified relative to the wisdom tooth roots were as follows : A-type (buccal) was most common, 34/50 (68%) ; B-type (just under), 15/50 (30%) ; C-type (lingual) was least common, 1/50 (2%). The shortest distance from the mandibular canal to the inferior wisdom tooth roots (IW-C) was 2.7±1.6mm, and the coefficient of variation here was the largest the regions (59%). The coefficient of variation in the vertical distance (IC-IB) was larger than horizontal distance (LC-LB). The area of the mandibular canal on the cross-sectional tomographic cuts was 18.7±6.9mm^2, and the coeficient of variation was 37%. The ratio of the major (ODL) to minor axis (ODS) of the mandibular canal on the cross-sectional tomographic cuts was 3.2±1.0, the shape of the mandibular canal was shown to be elliptical.
北海道医療大学の論文
1999-06-30