Oral Function and Rehabilitation, Nihon University Graduate School of Dentistry at Matsudo.
Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo.
J Oral Sci. 2024;66(1):66-69. doi: 10.2334/josnusd.23-0362.
This study aimed to compare awake bruxism events between subjective and objective evaluations using a questionnaire survey and a modified portable electromyography (EMG) device, and to examine correlations between sleep quality and awake bruxism.
The Epworth Sleepiness Scale (ESS), Pittsburgh Sleep Quality Index (PSQI), and awareness of awake bruxism as clarified via interviews were conducted on 34 participants as subjective evaluations. The EMG device was used to record left temporal muscle activity for 6.5 h (from 09:00 to 15:30) and the number of awake bruxism episodes per hour. The participants were then classified into "bruxer" and "non-bruxer" groups based on the number of awake bruxism episodes.
The mean number of awake bruxism episodes per hour was 33.6 ± 21.4, and 23% of the participants who reported having no awareness of awake bruxism in the interviews were defined as "bruxers" in the objective evaluations. In the bruxer group, positive correlations were found between the number of awake bruxism episodes and both ESS and PSQI scores.
These findings suggest that objective measurements using a portable EMG device can increase the diagnostic accuracy for awake bruxism, and that sleep quality is a major risk factor for awake bruxism.
本研究旨在通过问卷调查和改良便携式肌电图（EMG）设备对主观和客观评估进行比较，以探讨睡眠质量与清醒磨牙症之间的相关性。
34 名参与者进行了主观评估，包括 Epworth 嗜睡量表（ESS）、匹兹堡睡眠质量指数（PSQI）和访谈中明确的清醒磨牙症意识。使用 EMG 设备记录左侧颞肌活动 6.5 小时（从 09:00 到 15:30），并记录每小时清醒磨牙症发作次数。然后根据清醒磨牙症发作次数将参与者分为“磨牙症者”和“非磨牙症者”两组。
每小时清醒磨牙症发作次数的平均值为 33.6±21.4，在访谈中报告没有清醒磨牙症意识的参与者中，有 23%在客观评估中被定义为“磨牙症者”。在磨牙症者组中，清醒磨牙症发作次数与 ESS 和 PSQI 评分均呈正相关。
这些发现表明，使用便携式 EMG 设备进行客观测量可以提高清醒磨牙症的诊断准确性，睡眠质量是清醒磨牙症的主要危险因素。
