Clinical Study on Bruxism in Human during Sleep

在最近的磨牙症的研究中，大多数使用有线记录设备，但从电线的约束感影响中枢神经系统（CNS）和生物现象的准确记录不能。此外，便携式无线EMG类型的设备给出了相当不准确的记录，并且不能记录睡眠状况和其他与磨牙症密切相关的生物状况。因此，在本实验中，使用小型无线遥测仪，开发了一种将记录和分析夜间睡眠期间的生物现象的系统。并对正常人、磨牙症患者、CMD患者和无牙颌患者夜间睡眠的生物学现象进行了分析，以阐明人类的睡眠状况，尤其是磨牙症的睡眠状况。研究结果表明：建立了一个能够监测夜间睡眠生物学现象的系统，能够定量、直观地评价夜间睡眠脑波各阶段与夜磨牙症的关系。正常人、磨牙症患者、CMD患者和无牙颌患者的总睡眠时间大致相同。结果表明，与正常人组相比，磨牙症组和CMD患者组磨牙症发生率显著增高，睡眠阶段转换率显著增高，睡眠阶段1发生率显著增高，REM阶段发生率显著降低，存在睡眠障碍。同样清楚的是，如果功能稳定，无牙颌患者夜间睡眠时的磨牙症水平低于有牙齿的正常受试者，并且他们不太可能在夜间睡眠时因磨牙症而引发咀嚼功能障碍。

In most of the recent researches on bruxism wired recording devices were used, but the constrained feeling from the wires affected the central nerves system (CNS) and an accurate recording of biological phenomena could not be made. Also the portable wireless EMG type device gave rather inaccurate recordings and could not record the sleep condition and other biological conditions which were intimately related to bruxism.Therefore in this experiment using a small wireless telemeter a system that will record and analyze the biological phenomena during sleep at night was developed. And in order to clarify sleep condition of human especially that of bruxism the biological phenomena of normal subjects, bruxists, CMD patients, and edentulous patients during sleep at night were analyzed. The results were as follows.A system that can monitor biological phenomena of human during sleep at night, and that can evaluate quantitatively and visually the relation between brain wave sleep stages and bruxism during sleep at night was developed. Total sleep time were about the same for normal subjects, bruxists, CMD patients and edentulous patients. It was clear that compared to normal subject group, both bruxist group and CMD patients group had significantly high frequency of bruxism, significantly high frequency of transition between sleep stages, significantly high frequency of stage 1 and significantly low incidence of stage REM, and was suffering from sleep disorder. It was also clear that bruxism during sleep at night for edentulous patients were at a level lower than that of normal subjects with teeth if it was functionally stable and that they were less likely to have masticatory dysfnction initiated by bruxism during sleep at night.