Bruxism as a causative factor of craniomandibular disorders

磨牙症是颅下颌疾病的致病因素

• 批准号: 03044176
• 负责人: BANDO Eiichi
• 金额: --
• 依托单位: Tokushima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03044176/
• 关键词: Bruxism; EMG; ECG; Electrical Stimulation; Criteria for a bruxing event

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.

本项目的目的是建立一个高度可靠和可重复的标准磨牙事件使用咬肌肌电活动与心电图和呼吸反应。通过将原始EMG信号转换为RMS信号来分析咬肌，并且根据受试者的100%最大随意收缩（MVC）来量化该信号的幅度。磨牙事件定义为EMG高于基线和最大自主收缩水平的至少3%。使用此标准，RMS转换的EMG以上的事件标准的平均持续时间为14.3 <plus-minus>- 13.9秒，平均振幅为19.2 <plus-minus>- 31.2%的2。磨牙事件期间的平均心率为72.8 <plus-minus>- 12.5脉冲/分钟。磨牙事件期间的平均心率被发现增加了18.0 <plus-minus>- 9.2%时相比，平均心率为5秒期间立即在此evThe偶然传入电刺激嘴唇的影响进行了评价睡眠相关磨牙症。本研究采用4通道模拟磁带系统记录受试者家中5个晚上睡眠期间的咬肌肌电、心电图、呼吸和牙齿接触触发事件。在5个夜晚的临时电刺激嘴唇的5个患者中，有3个患者的咬肌肌电活动显著减少。每次磨牙事件的平均持续时间没有显著变化。没有受试者报告因为唇部刺激而在夜间醒来。这些数据表明，该方法可用作更严重磨牙症的治疗干预。

项目成果

K. Nishigawa, M. Nakano, E. Bando and G. T. Clark: "The relationship between lateral border movements of the mandible and the determinants of occlusion" The Journal of Prosthetic Dentistry. 66. 486-492 (1991)

K. Nishikawa、M. Nakano、E. Bando 和 G. T. Clark：“下颌骨横向边缘运动与咬合决定因素之间的关系”《修复牙科杂志》。

T. Ikeda, M. Nakano and E. Bando: "The effect of traumatic occlusal contact on tooth pain threshold" Journal of Dental Research. 70. 330 (1991)

T. Ikeda、M. Nakano 和 E. Bando：“创伤性咬合接触对牙齿疼痛阈值的影响”《牙科研究杂志》。

K.Nishigawa,M.Nakano,E.Bando and G.T.Clark: "The relationship between lateral border movements of the mandible and the determinants of occlusion" The Journal of Prosthetic Dentistry. 66. 486-492 (1991)

K.Nishikawa、M.Nakano、E.Bando 和 G.T.Clark：“下颌骨横向运动与咬合决定因素之间的关系”《修复牙科杂志》。