The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Immediate Effects of Asymmetric Chewing on Temporomandibular Joint Kinematics

  • Tae-Joon Um (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Han-Seung Choi (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Dong Yeop Lee (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Jae Ho Yu (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Jin Seop Kim (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Seung Gil Kim (Department of Physical Therapy, College of Health Sciences, Sun Moon University) ;
  • Jiheon Hong (Department of Physical Therapy, College of Health Sciences, Sun Moon University)
  • Received : 2023.11.20
  • Accepted : 2023.12.28
  • Published : 2023.12.31
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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.

Keywords

Acknowledgement

본 연구는 한국 정부가 지원하는 한국연구재단의 연구비 지원을 받은 연구임(RS-2023-00253175).

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