Movement and function of mandible--a simplified mechano-morphological model of mandible.

: It is an obvious fact that the shape of mandibles and its change are much concerned with the force vector of mastication muscles. In reference to the shape of mentum, however, it is yet inexplicable up to the present that the human mentum is such toughly shaped as being bearable against the force induced by mastication. In this paper, the authors show their three-dimensional mechanics model for the analysis in strength and they indicate that this model is suitable to explaining the shape.