Biological changes before the onset of awake bruxism

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K19103
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 57050:Prosthodontics-related
• Research Institution: Showa University
• Principal Investigator: Sato Tamiyo 昭和大学, 歯学部, 助教 (40814629)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 覚醒時ブラキシズム

Outline of Final Research Achievements

In this study, we examined the relationship between the onset of Awake Bruxism (AB), one of the risk factors for temporomandibular disorders, and biological information. Healthy participants wore a wearable body sensing platform device during daily lives, then both electromyogram (EMG) of the left masseter muscle and electrocardiogram (ECG) were measured simultaneously. Heart rate seemed to increase just before the onset of AB episodes, while LF/HF ratio of heart rate variability showed no difference. This study suggested that heart rate might predict the onsets of AB and could provide new knowledge for the onset mechanism of AB.

Free Research Field

補綴・理工系歯学

Academic Significance and Societal Importance of the Research Achievements

覚醒時ブラキシズム（AB: Awake Bruxism）発生と生体情報の相互関係を生理的な観点から網羅的に評価を行った報告は過去にない。生体情報の変化を評価することにより、ABと睡眠時ブラキシズム（SB：Sleep Bruxism）との関連性やリスク因子の評価も可能である。また生体情報からAB発生を予測できれば、ウェアラブル機器を用いてAB発生直前に顎関節症患者へリスクを通知できるため、AB是正のための認知行動療法のツールとして臨床に応用できる。