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The Association Between Masticatory Function Assessment and Masseter Muscle Thickness in the Elderly

Journal of Oral Medicine and Pain 2020년 45권 3호 p.49 ~ 55
정효정, 민영광, 김효정, 이주영, 최종훈, 김백일, 안형준,
소속 상세정보
정효정 ( Jung Hyo-Jung ) - Yonsei University College of Dentistry Department of Orofacial Pain and Oral Medicine
민영광 ( Min Yong-Guang ) - Yonsei University College of Dentistry Department of Orofacial Pain and Oral Medicine
김효정 ( Kim Hyo-Jung ) - Yonsei University College of Dentistry Department of Preventive Dentistry & Public Oral Health
이주영 ( Lee Joo-Young ) - Yonsei University College of Dentistry Department of Preventive Dentistry & Public Oral Health
최종훈 ( Choi Jong-Hoon ) - Yonsei University College of Dentistry Department of Orofacial Pain and Oral Medicine
김백일 ( Kim Baek-Il ) - Yonsei University College of Dentistry Department of Preventive Dentistry & Public Oral Health
안형준 ( Ahn Hyung-Joon ) - Yonsei University College of Dentistry Department of Orofacial Pain and Oral Medicine

Abstract


Purpose: This study investigated the association between the objective indicator of masticatory function assessment and the masseter muscle thickness (MMT) using ultrasound imaging.

Methods: A total of 99 subjects (males: 24, females: 75, mean age: 76) were analyzed. The maximum bite force (MBF) was measured with a pressure-sensitive sheet and an image scanner. The mixing ability index (MAI) was calculated by image analysis after asking the subjects to chew a wax specimen. The MMT during rest and clenching were obtained with a diagnostic ultrasound system, and the difference in MMT during rest and MMT during clenching was defined as the difference in masseter muscle thickness (DMMT). Multiple regression analysis was performed to determine the independent variables affecting MBF and MAI.

Results: The MBF showed correlation with the number of remaining teeth (β=0.346, p=0.002) and DMMT (β=0.251, p=0.011). The MAI correlated with only the number of remaining teeth (β=0.476, p<0.001).

Conclusions: The DMMT reflects the state of masseter muscle contraction, and can be used as a predictor as well as the number of teeth when assessing masticatory function.

키워드

Bite force; Masseter muscle; Mastication; Ultrasonography

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