The biomechanical study on the mechanism of the mandibular condylar fracture -part 1-
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概要
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The condylar process is one of the sites predisposed to fracture clinical and experimental studies on the fracture mechanism have so far been undertaken by a number of our precedessor. However, the difference in the fracture mechanisms of intracapsular and exracapsular fracture has not completely been determined yet.In a Japanese Journal of Oral and Maxillofacial Surgery: Vol. 32, 1362-1381, 1986: Shimada have previously reported the strong possibility that the direction and extend of fracture lines in the fracture of condylar process were influencend by the morphological characteristies of the condylar head. In order to verify this postulation, stress distribution patterns by the cross-sectional morphology of various types of condylar heads were investigated by two-dimensional finte element method, using 15 Indian edentulous mandibles. In this analysis, loading was applied to three directions in the modle of the mandibular body, and two directions in the motile of the mandibular head.The results indicated the following something.1) With the loading in the direction of condylar head from mandibular angle, compressed stress arised on the condylar head with the surface. And with the loading in the direction of condylar head from chin and mandibular body, tugged stress arised on the condylar neck.2) With the loading in the direction of vertical, these were conjectured that comminuted fracture arised on convex type, sagital fracture arised on concave type and a style midway fracture arised on straight type.3) With the loaidng in the direction of lateral, these were conjectured that fracture of condylar neck arised on the three types, especially the tendency was remarkable on straight type.
- 一般社団法人 日本顎関節学会の論文
一般社団法人 日本顎関節学会 | 論文
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