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

1. 新型紧凑型磨耗监测装置的研制研制了一种新型紧凑型磨耗监测装置，该装置具有易于使用和自动分析的特点。新设备的尺寸为65mm × 100mm × 35mm。它可以放在额头上，需要5根拾取电缆连接到带有and电路的电极上，该电路只有在两个咬肌都被激活时才能工作。该设备有3个数字监视器，显示右、左、双咬肌的总磨牙时间。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较少，因此可以在受试者清醒和睡眠时使用。结果表明，该装置可用于检查白天和夜间的磨牙活动。牙周损害与磨牙症关系的研究。用yj . katoet研制的下颌运动记录仪比较了夜间磨牙和白天有意识磨牙的下颌运动、肌肉活动和牙齿接触的差异。结果表明，白天和夜间的颌部位置和颌部运动方向有较大差异。本文对实验性牙周炎和牙合损伤猴的分形区破坏过程进行了临床、影像学和病理学研究。结论：炎症引起的分叉受累在初始阶段进展缓慢，炎症合并咬合创伤后进展迅速。临床研究磨牙症对人磨牙分岔受累的影响，第一个实验对45例分岔受累患者进行检查，第二个实验将37例患者分为两组：第一组使用咬合夹板1年以上；第二组患者短期佩戴夹板，进行临床及细菌学检查。结果显示，强磨牙组的分叉受累程度更严重。与第二组相比，第一组的分叉受累情况明显改善。然而，两组之间的细菌比例没有差异。因此，我们认为夜磨牙影响分岔累及的进展。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