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KMID : 0357220230350060185
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Journal of Korean Society Physical Therapy
2023 Volume.35 No. 6 p.185 ~ p.189
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Immediate Effects of Asymmetric Chewing on Temporomandibular Joint Kinematics
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Um Tae-Joon
Choi Han-Seung
Lee Dong-Yeop
Yu Jae-Ho
Kim Jin-Seop
Kim Seung-Gil
Hong Ji-Heon
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Abstract
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Purpose: This study investigated the immediate biomechanical effects of unilateral mastication for 10 minutes on the temporomandibu- lar 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 varia- tion 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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KEYWORD
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Temporomandibular joint, Masticatory movement, Unilateral mastication
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