頭部規格断層X線撮影による顎関節の矢状断面形態に関する研究 (1報)

概要

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One hundred temporomandibular joints of 50 adults with normal occlusion were studied using a cephalometric laminagraph "Sectograph". The results were as follows : 1. The mean depth of the mandibular fossa was 8.7mm ; the anteroposterior length, 19.0mm ; the anteroposterior length of the frontal area of the mandibular fossa, 10.3 mm ; the anteroposterior distance at the middle level of the depth of the mandibular fossa, 10.8mm. The frontal area of the mandi bular fossa was 41.7 mm^2 ; the rear area, 51.1 mm^2. 2. The salient width of the si gmoid curve of the frontal wall was 2.0 mm ; the upper curve, 0.8 mm ; the lower curve ; 1.2 mm. 3. The inclination of the frontal wall to Frankfort horizontal line was 40.4° ; the rear wall, 35.2°. The radius of the circumference on the upper curve of the frontal wall was 5.6mm ; the lower curve, 8.1 mm. 4. The salient width of the rear wall was 0.8mm. The radius of the circumference on the rear wall was 11.6mm. 5. The anteroposterior width of the condyle was 9.5mm, the width of the frontal region of the condyle divided by the condylar top, 3.8mm. 6. This study established the standard size of T. M. J. in the sagittal plane, and makes possible the detection of abnormalities. It also established the basis of mean-value articulator.
日本補綴歯科学会の論文
1988-08-01