Bruxism as a causative factor of craniomandibular disorders

该项目的目的是建立一个高度可靠和可重复的标准，通过咬肌肌电图活动以及心电图和呼吸反应来判断擦伤事件。通过将原始肌电信号转换为RMS信号来分析Masseter，并根据受试者的100%最大自愿收缩（MVC）来量化该信号的幅度。磨耗事件的定义是肌电高于基线，且至少达到最大自愿收缩水平的3%。使用该标准，高于事件标准的RMS转换EMG的平均持续时间为14.3<正负>13.9秒，平均振幅为19.2<正负>31.2%。在磨擦运动中，平均心率为72.8<正负>12.5次/分钟。与此之前5秒的平均心率相比，磨牙事件期间的平均心率增加了18.0<正负bb0 < 9.2%。随机传入电刺激唇对睡眠相关性磨牙的影响进行了评估。本研究使用4通道模拟磁带系统记录受试者家中睡眠时咬肌肌电图、心电图、呼吸和牙齿接触触发事件。5名接受测试的患者中，有3名患者在5个晚上的偶然唇电刺激中，咬肌肌电图活动明显减少。各磨擦项目的平均持续时间无显著变化。没有受试者报告因嘴唇刺激而在夜间醒来。这些数据表明，该方法可能是一种有用的治疗干预更严重的擦伤。

The purpose of this project was to establish a highly reliable and reproducible criteria for a bruxing event using masseter EMG activity together with ECG and respiration responses. Masseter was analyzed by converting the raw EMG signal to an RMS signal and the amplitude of this signal was quantified in terms of the subject's 100% maximum voluntary contraction (MVC).1. A bruxing event was defined by an increase in EMG above baseline and at least 3% of maximum voluntary contraction level. Using this criteria, a mean duration of the RMS converted EMG above the event criteria was 14.3<plus-minus>13.9 seconds and the mean amplitude was 19.2<plus-minus>31.2% of2. Mean heart rate was shown to be 72.8<plus-minus>12.5 pulses/minute during bruxing events. The mean heart rate during a bruxing event was found to be increased by 18.0<plus-minus>9.2% when compared to the mean heart rate for the period 5 seconds immediately before this evThe effect of contingent afferent electrical stimulation to the lip was evaluated for sleep associated bruxism. This study used a 4 channel analog tape system to record masseter EMG, ECG, respiration and tooth contact triggered events during sleep in the subject's home for 5 nights.1. A substantial reduction of total masseter EMG activity was observed in 3 of 5 patients tested, across the 5 night of contingent electrical lip stimulation. There was no remarkable change in the mean duration of each bruxing event.2. No subject reported awaking during the night because of the lip stimulation.3. These data, suggest the method may be useful as a therapeutic intervention for more severe bruxers.