顎関節の立体的骨構造と顆頭の動きに伴う下顎窩-顆頭間の立体的関係 : 第1報咬頭嵌合位における下顎窩-顆頭間関係について

概要

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Structural study of the temporomandibular joint is a key issue in prosthodontics because the T.M.J. is the most important element of manclibular movement. As three-dimensional investigation is needed in this field, I recently developed a personal computer system that can form three-dimensional images of the T.M.J.. The use of three-dirrtensional images created by the computer system is effective to research the shape of the T.M.J. and mandibular movements. Using this system, I studied condyle behavior and the relationship between mandibular fossa and condyle. The results are as follows : 1. In an intercuspal position, each distance between forssea and condyle at its middle, inner and outer part is almost the same. The distance between the fossa and condyle at its center, front and rear is nearly equal. 2. Rige lines of fossa, condyle and articular tubercle have sirrtilar form. Three-dimensional images of the T.M.J. can be reconstructed from successive sections of a T.M.J. of a dry skull. The images can be sectioned at arbitrary positions in sagittal, frontal and horizontal planes, and by the addition of movement data, mandibular movement can be simulated.
日本補綴歯科学会の論文
1991-02-01