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Article

Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise

1
Department of Sports Medicine/Dentistry, Division of Public Health, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
2
Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
3
Clinical Center for Sports Medicine and Sports Dentistry, Medical Hospital, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
4
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Maysam Abbod
Sensors 2021, 21(4), 1503; https://doi.org/10.3390/s21041503
Received: 12 January 2021 / Revised: 11 February 2021 / Accepted: 18 February 2021 / Published: 22 February 2021
(This article belongs to the Section Intelligent Sensors)
Teeth clenching during exercise is important for sports performance and health. Recently, several mouth guard (MG)-type wearable devices for exercise were studied because they do not disrupt the exercise. In this study, we developed a wearable MG device with force sensors on both sides of the maxillary first molars to monitor teeth clenching. The force sensor output increased linearly up to 70 N. In four simple occlusion tests, the trends exhibited by the outputs of the MG sensor were consistent with those of an electromyogram (EMG), and the MG device featured sufficient temporal resolution to measure the timing of teeth clenching. When the jaw moved, the MG sensor outputs depended on the sensor position. The MG sensor output from the teeth-grinding test agreed with the video-motion analysis results. It was comparatively difficult to use the EMG because it contained a significant noise level. Finally, the usefulness of the MG sensor was confirmed through an exercise tolerance test. This study indicated that the developed wearable MG device is useful for monitoring clenching timing and duration, and the degree of clenching during exercise, which can contribute to explaining the relationship between teeth clenching and sports performance. View Full-Text
Keywords: teeth clenching; wearable sensor; mouth guards; sports performance; masseter muscle; electromyogram; force transducer; occlusal force teeth clenching; wearable sensor; mouth guards; sports performance; masseter muscle; electromyogram; force transducer; occlusal force
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MDPI and ACS Style

Kinjo, R.; Wada, T.; Churei, H.; Ohmi, T.; Hayashi, K.; Yagishita, K.; Uo, M.; Ueno, T. Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise. Sensors 2021, 21, 1503. https://doi.org/10.3390/s21041503

AMA Style

Kinjo R, Wada T, Churei H, Ohmi T, Hayashi K, Yagishita K, Uo M, Ueno T. Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise. Sensors. 2021; 21(4):1503. https://doi.org/10.3390/s21041503

Chicago/Turabian Style

Kinjo, Rio, Takahiro Wada, Hiroshi Churei, Takehiro Ohmi, Kairi Hayashi, Kazuyoshi Yagishita, Motohiro Uo, and Toshiaki Ueno. 2021. "Development of a Wearable Mouth Guard Device for Monitoring Teeth Clenching during Exercise" Sensors 21, no. 4: 1503. https://doi.org/10.3390/s21041503

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