PORTABLE EMG RECORDING/ANALYSING SYSTEM OF NOCTURNAL BRUXISM

夜间磨牙症便携式肌电记录/分析系统

• 批准号: 07457473
• 负责人: SUETUGU Tuneo
• 金额: $ 4.99万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07457473/
• 关键词: BRUXISM; NOCTURNAL ENG EVALUATION; PORTABLE ENG RECORDING DEVISE; OCCLUSAL DYSFUNCTION; SPLINT

We developed the portable electromyographic (EMG) recording/analyzing system, which consists of a portable EMG unit and a cassette data recorder, and a software for data acquisition and analysis. This system allows long-time noctumal EMG recordings of the subject by his or herself in the natural envirorment for us to investigate bruxism. With this system we can analyze the bruxism activity of the subject in detail, i.e., the number of bruxism event, duration, the activity of jaw muscles. Nocturnal EMG recordings of the masseter muscle from 18 bruxers and 2l normal subjects were described to establish the criteria for detection of bruxism events. From the data, we defined the bruxing event if the activity of the masseter muscle exceeded a 10% of his or her maximum voluntary contraction, and objectively described bruxers from EMG duration and activity. A clinical examination disclosed that bruxers showed significant tenderness of the superficial masseter and anterior temporalis muscles. We also described the reliability and reproducibility of the system as the accuracy, precision and consistency of mesuremens by valuating day to day variation from 4 bruxers and 5 normal subjects.Finally we studied the effect of occlusal splints on the masseter muscle activity during sleep. The subjects were instructed to ware stabilization type occlusal splints during sleep at night for 7 days and the data was obtained from 10 bruxers and 10 normal subjects every night between 7 days before and 7 days after the beginning of splint trials, i.e., 14 conservative nights. Although occlusal splint did not significantly reduce masseter muscle activity in bruxers in total, 3 bruxers showed a reduction of EMG duration and 4 bruxers showed reduced EMG duration and activity compared to the baseline.

我们研制了便携式肌电记录/分析系统，该系统由便携式肌电仪和盒式数据记录仪以及数据采集和分析软件组成。该系统可在自然环境中对受试者进行长时间的体表肌电记录，用于研究磨牙症。利用该系统，我们可以详细分析受试者的磨牙症活动，即，磨牙次数、持续时间、颌肌活动度。本文报道了18例磨牙症患者和21例正常人的咬肌夜间肌电图记录，以建立磨牙症的诊断标准。从数据中，我们定义磨牙事件，如果咬肌的活动超过他或她的最大自愿收缩的10%，并客观地描述磨牙症从EMG持续时间和活动。临床检查发现磨牙者的咬肌和颞肌前部有明显的压痛。通过对4名磨牙者和5名正常人的日常测量，评价了系统的可靠性和重复性，即测量的准确性、精确性和一致性，最后研究了咬合板对睡眠时咬肌活动的影响。受试者被指示在夜间睡眠期间佩戴稳定型咬合夹板，持续7天，并且在夹板试验开始前7天和试验开始后7天之间每天晚上从10名磨牙者和10名正常受试者获得数据，即，14个保守的夜晚虽然咬合板并没有显着减少咬肌活动的磨牙症患者的总数，3磨牙症患者表现出减少的肌电图持续时间和4磨牙症患者表现出减少的肌电图持续时间和活动相比，基线。