Development of New Bruxism Monitoring and Elucidation of Mechanism of Periodontal Destruction

1.一种新型的磨牙症监测仪的研制我们研制了一种新型的磨牙症监测仪，它具有使用方便，自动分析系统。新器械的尺寸为65 mm x 100 mm x 35 mm。它可以放置在额头上，5个拾音电缆需要连接到电极与电路，只有当两个咬肌都被激活时才能工作。该设备有3个数字显示器，显示右，左和两个咬肌的总磨牙时间。它可以客观地监测磨牙活动，并且与以前的模型相比，对患者的不愉快感觉更少，因此可以在受试者清醒和睡眠时使用。结果表明，该装置可用于检测磨牙症患者白天和夜间的磨牙活动.牙周组织破坏与磨牙症关系的研究。夜间活动的青少年下颌运动、肌肉活动和牙齿接触的差异 ...更多信息 用Katoet等研制的下颌运动记录仪对白天磨牙症和有意识磨牙症进行比较。结果表明，实验性牙周炎和咬合创伤猴的下颌位置和下颌运动方向在白天和夜间有很大差异。本研究通过临床、X线和病理学观察，观察了实验性牙周炎和咬合创伤猴根分叉区的破坏过程。本研究通过临床实验，对磨牙磨牙根分叉病变的影响进行了研究，实验一为45例根分叉病变患者，实验二为37例根分叉病变患者，分为两组：第一组戴夹板1年以上，第二组戴夹板时间较短，并进行临床和细菌学检查。结果表明，磨牙症严重组根分叉病变较严重。与第二组相比，第一组的根分叉病变明显改善。然而，两组之间的细菌比率没有差异。因此，夜间磨牙症影响了根分叉病变的进展。少

1. Development of a New Compact Bruxism Monitoring DeviceWe developed a new compact bruxism monitoring device, which had ease of application and auto- analyzing system. The size of the new device is 65mm x 100 mm x 35mm. It can be placed on the forehead, and 5 pick-up cables need to be connected to the electrodes with AND circuit that works only when both masseter muscles were activated. The device has 3 digital monitors that shows total bruxism time of right, left and both masseter muscles. It can objectively monitor the bruxism activities, and has less unpleasant feeling to the patients compared to the previous models, so that can be used when subjects are awake and sleeping. As the result of using the device to the cohorts, it was shown that the new device was useful for examining the bruxism activities during daytime and night.2. Study of the Relation between Periodontal Destruction and BruxismThe. difference of jaw movement, muscle activity and tooth contacts between nocturnal bru … More xism and conscious bruxism in daytime were compared by using the jaw movement recorder developed by Y.Katoet. The result showed that the jaw position and the jaw movement direction in the daytime and night was quite different.The destruction process of furcation areas of monkeys with experimental periodontitis and occlusal trauma were investigated clinically, radiographically and pathologically. It was concluded that furcation involvement would advance slowly at initial stage by inflammation and progress rapidly with combination of inflammation and occlusal trauma.The influence of bruxism on human molar furcation involvement was clinically investigated, In the first experiment, 45 patients with furcation involvement were examined, and in the second experiment, 37 patients were classified into two groups : the first group wore occlusal splints for more than 1 year ; the second group wore splints for short period, and clinical and bacteriological examination were performed. The result showed that the furcation involvement was more severe in the strong bruxism group. Furcation involvement in the first group improved considerably as compared to that of the second group. However, there was no difference in the bacterial ratio between the two groups. Therefore, it was suggested that nocturnal bruxism influences the progression of furcation involvement. Less