Elucidation of acutual state of awake bruxism in patients with temporomandibular disorders by using wearable electromyogram systems

为了解颞下颌关节紊乱病和夜间磨牙症患者清醒磨牙症的实际情况，我们分析了他们白天和夜间的咬肌活动。除进餐时间外，正常人白天清醒状态下咬肌肌电图（EMG）活动的总积分值较小。在颞下颌关节紊乱病和夜磨牙症患者中获得的值相对较大，几乎等于总进餐时间。夜间咬肌肌电活动中，清醒状态下的咬肌肌电活动混杂在睡眠各阶段中，占相当比例。提示在研究磨牙症对人体机体和生命的影响时，应注意白天清醒状态和夜间睡眠各阶段中清醒阶段的肌肉活动，以及睡眠各阶段的肌肉活动。

To clarify the actual state of awake bruxism in patients with temporomandibular disorders and nocturnal bruxism, we analyzed their masseteric activities in the daytime and nighttime. Total integral value of elctromyographic(EMG) activities of masseter muscles during awake state in the daytime except meal time was relatively small in healthy subjects. The value obtained in the patients with temporomandibular disorders and nocturnal bruxism was relatively large and almost equal to those in the total meal time. The masseteric EMG activities during awake states intermingled among the sleep stages in the nighttime accounted for considerable rate of nocturnal masseteric EMG activities. It was suggested that we should pay attention to muscle activities at awake states in the daytime and awake stages among sleep stages in the nighttime, as well as muscle activities during sleep stages, when we consider influences of bruxism on human organism and life.