Three-dimensional finite element modelling of muscle forces during mastication

Abstract This paper presents a three-dimensional finite element model of human mastication. Specifically, an anatomically realistic model of the masseter muscles and associated bones is used to investigate the dynamics of chewing. A motion capture system is used to track the jaw motion of a subject...

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Bibliographic Details
Published in:Journal of biomechanics 2007-01, Vol.40 (15), p.3363-3372
Main Authors: Röhrle, Oliver, Pullan, Andrew J
Format: Article
Language:English
Subjects:
Biomechanical Phenomena
Finite elasticity
Finite Element Analysis
Finite element method
Human mastication
Humans
Imaging, Three-Dimensional
Mastication
Models, Biological
Muscles - physiology
Physical Medicine and Rehabilitation
Skeletal muscle modelling
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Summary:Abstract This paper presents a three-dimensional finite element model of human mastication. Specifically, an anatomically realistic model of the masseter muscles and associated bones is used to investigate the dynamics of chewing. A motion capture system is used to track the jaw motion of a subject chewing standard foods. The three-dimensional nonlinear deformation of the masseter muscles are calculated via the finite element method, using the jaw motion data as boundary conditions. Motion-driven muscle activation patterns and a transversely isotropic material law, defined in a muscle-fibre coordinate system, are used in the calculations. Time–force relationships are presented and analysed with respect to different tasks during mastication, e.g. opening, closing, and biting, and are also compared to a more traditional one-dimensional model. The results strongly suggest that, due to the complex arrangement of muscle force directions, modelling skeletal muscles as conventional one-dimensional lines of action might introduce a significant source of error.
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2007.05.011