Steven Mills
ABSTRACT
The motion of the jaw during chewing may be used to help diagnose and assess disorders associated with the temporomandibular joints and muscles. In this paper we examine different co-ordinate frames which might be used in the analysis of motion capture data for chewing. While the jaw is often considered a hinge joint, allowing rotation about an axis, it also exhibits significant translational motion. We show that principal components extracted using a Cartesian co-ordinate frame explain at least as much, and in some cases more, of the motion as those extracted from cylindrical co-ordinates. We also show that these components can be used to extract the cyclic motion of the jaw during chewing.
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Index Terms
- Principal Component Representations of Chewing Motion
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