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Does bruxism affect periodontal sensation?

磨牙症会影响牙周感觉吗？

基本信息

批准号：
13470414
负责人：
MINAGI Shogo
金额：
$ 6.34万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

Low periodontal sensation could sometimes be observed clinically in heavy bruxist. Although several studies have tried to quantitatively evaluate periodontal sensation, it had not yet been fully clarified especially in regard to the difference of response modality between intradental mechanoreceptors and periodontal ligament mechanoreceptors.This study aimed to 1) establish a reliable method for evaluating the threshold of periodontal sensation from periodontal ligament mechanoreceptors, 2) examine the properties of periodontal sensation in non-bruxers (fluctuation of the force threshold within a day, day-to-day fluctuation and the effect of transient mechanical loading and 3) compare the threshold in bruxer and non-bruxer.Low speed mechanical stimulator had silent force generator made of elastic foamed polymer and was capable of exerting the silent mechanical load with slow and steady increase to the target tooth. This stimulator, hence, could measure the force threshold derived from periodontal ligament mechanoreceptor.Eighteen non-bruxers with full natural dentition participated in examining the properties of periodontal sensation. Upper left lateral incisor of each volunteer was subjected. As regards fluctuation of the force threshold within a day and day-to-day fluctuation, no significant difference was observed. However significant increase of periodontal sensation was observed after a transient mechanical loading.Twenty volunteers with full natural dentition (10 non-bruxers, 10 bruxers) was subjected in comparing the periodontal sensation. Nocturnal bruxism was confirmed by electromyography. Subjective tooth was upper left lateral incisor of each volunteer. Occlusal facet was not observed in all subjected tooth. The threshold for periodontal ligament mechanoreceptors in bruxers was significantly higher than that in non-bruxers.

重度磨牙者有时会出现牙周感觉减退。本研究的目的是：1）建立一种可靠的牙周膜机械感受器感觉阈值的测定方法，2）检查非磨牙者的牙周感觉特性（一天内力阈值的波动，日常波动和瞬态机械负荷的影响和3）比较在Bruxer和非低速机械刺激器具有由弹性泡沫聚合物制成的无声力发生器，并且能够向目标牙齿施加缓慢且稳定增加的无声机械载荷。因此，这种刺激器，可以测量牙周膜机械感受器的力阈值。十八个非磨牙者与完整的自然牙列参与检查牙周感觉的性质。每个志愿者的左上侧切牙。至于力阈值的日内波动和日间波动，未观察到显著差异。20名自然牙列的志愿者（10名非磨牙者，10名磨牙者）在短暂的机械负荷后，牙周感觉明显增强。夜间磨牙症是由肌电图证实。主观牙齿为每位志愿者的左上侧切牙。所有受试牙均未观察到咬合小平面。磨牙者牙周膜机械感受器的阈值明显高于非磨牙者。