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Finite element modeling of TMJ joint disc behavior
Maxime Jaisson1, Philippe Lestriez, Redha Taiar
1EA 4301, université de Reims-Champagne-Ardenne, Groupe de recherche en sciences pour l'ingénieur, Mécanique appliquée et numérique (URCA/GReSPI/MAN), UFR odontologie, Moulin de la Housse, BP 1039, 51687 Reims cedex 2, France.
International Orthodontics
|January 31, 2012
Summary
The temporomandibular joint (TMJ) disc absorbs and redistributes masticatory forces. Maximum stress areas on the TMJ disc were identified, demonstrating joint resiliency under various frequencies.
Area of Science:
- Biomechanics
- Biomedical Engineering
- Anatomy
Background:
- The temporomandibular joint (TMJ) disc plays a crucial role in the masticatory system due to its unique biodynamics.
- It deforms under masticatory muscle stresses, absorbing and redistributing forces.
Purpose of the Study:
- To investigate the biomechanical behavior of the temporomandibular joint (TMJ) disc under varying masticatory forces.
- To identify areas of maximum stress within the TMJ disc during simulated mastication.
Main Methods:
- A finite element anatomical model of the TMJ was created using CT-scan slices and MRI images.
- Maximum muscle forces were decomposed into vectors, and resultant forces were applied to the model at different frequencies.
- Simulated masticatory forces were analyzed to determine stress distribution and reaction forces.
Main Results:
- Reaction forces at the glenoid fossa reached up to 1035 N, varying with indentation frequency.
- Maximum stress areas were consistently observed on the lateral portion and posterior band of the disc.
- Peak stress reached 13.2 MPa during a 32-second exercise at a 0.5 Hz frequency.
Conclusions:
- The study demonstrated the resiliency of the TMJ disc, despite the need for refinement in its behavior law.
- Maximum stress distribution was consistent across different exercises due to anatomical factors and force application axes.
- Findings provide insights into TMJ disorders and suggest avenues for future research.
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