J Korean Phys Ther.
2023 Dec;35(6):185-189. 10.18857/jkpt.2023.35.6.185.
Immediate Effects of Asymmetric Chewing on Temporomandibular Joint Kinematics
- Affiliations
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- 1Department of Physical Therapy, College of Health Sciences, Sun Moon University, Asan, Republic of Korea
- KMID: 2552682
- DOI: http://doi.org/10.18857/jkpt.2023.35.6.185
Abstract
- Purpose
This study investigated the immediate biomechanical effects of unilateral mastication for 10 minutes on the temporomandibular joint (TMJ) with 21 healthy adult participants.
Methods
The gum group chewed gum on the right side for 10 minutes, and the control group rested for 10 minutes. Biomechanical data were obtained using a three-dimensional infrared camera before and after intervention. An independent t-test assessed the variation of kinematic data to identify differences between before and after intervention.
Results
Among biomechanical variables, the gum group’s length of the left forehead middle region and the temporomandibular joint angle decreased compared to the control group (p<0.05).
Conclusion
Caution with unilateral masticatory activity is recommended, as unilateral mastication causes biomechanical changes due to excessive load on the soft tissues of the contralateral TMJ.
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