Abstract
The influences of condylar and Incisal paths to cusp path were computed theoretically basyed on the mathematical model of mandibular movement derived by Takayama and Hobo. An method for representing the computed results graphically was presented.
By this method, 1) the differences between the influences of condylar and Incisal paths, 2) the differences between the influences on 2nd molar, 1st molar and 2nd premolar, and 3) the linear character of the curves representing the influences of condylar and incisal paths to cusp path, are shown visually.
Utilizing the linear character of the curves, theoretical linear expressions on the influences of condylar and Incisal paths to cusp path were derived for each molar. The theoretical linear expres-sions were compared with the experimental linear expressions which were statistically derived by Ogawa et al. based on the measured results using an electronic mandibular movement measuring system with six degrees of freedom. It was proved that the theoretical and experimental expressions were approximately the same.
