The Jaw Adductor Resultant and Estimated Bite Force in Primates

Figure 3

Method for determining the location and orientation of the masseter muscle for Subsets 2 and 3. The black dots on the cranium represent the anterior-most and posterior-most points of origin for the masseter muscle group. The black dots on the mandible represent the anterior-most and posterior-most points of insertion. The orientations of the two lines (relative to the occlusal plane) were summed to obtain the orientation of the resultant for the masseter. A similar process was applied to the temporalis and to the medial pterygoid. Drawing by AHR.