Theoretical Prediction of Muscle Forces on the Mandible During Bite

[+] Author and Article Information
Q. S. Kang, D. P. Updike

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania, 18015

Eric P. Salathe

Institute for Biomedical Engineering and Mathematical Biology, Lehigh University, Bethlehem, Pennsylvania, 18015

J Biomech Eng 112(4), 432-436 (Nov 01, 1990) (5 pages) doi:10.1115/1.2891207 History: Received January 26, 1989; Revised August 01, 1990; Online March 17, 2008


We present a mathematical model to determine the contribution of each muscle acting on the mandible in the development of a given bite force. We give special attention to the representation of the widely radiated temporalis and account for the attachment of the external pterygoid to the capsular ligament. An optimization technique based on minimizing the maximum stress occurring in the muscles is used to resolve the statically indeterminant nature of the problem formulated. The theoretically predicted values of the muscle forces are compared to experimental results taken from the literature.

Copyright © 1990 by The American Society of Mechanical Engineers
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