The effect of bruxism on periodontal function

磨牙症对牙周功能的影响

• 批准号: 16591967
• 负责人: SUGANUMA Takeshi
• 金额: $ 1.22万
• 依托单位: Showa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16591967/
• 关键词: Bruxism; Periodontal membrane; Interocclusal tactile threshold; Clenching; Tooth displacement; 咬合力

Periodontal sensation and tooth displacement in individuals with bruxism may differ from those in non-bruxers, as excessive amounts of ocdusal force may be applied to the teeth during the night. The purpose of this study was to investigate the effects of bruxism on periodontal sensation in the molar region and tooth displacement.Fourteen subjects were divided into the non-bruxers (n=7) and the bruxers (n=7). Bruxism was confirmed based on the nocturnal electromyography activities of the masseter musde. Periodontal sensation was assessed based on interocdusal tactile threshold, which refers to the minimal thickness that can be detected between the occlusal surfaces of the teeth. Interocdusal tactile threshold was measured in the first molar region each for the left and right sides by randomly placing metal foils, and was measured twice daily (morning and afternoon) on 3 separate days. Multivariate analysis of variance was performed for bruxism (with or without) as a between-subjects effect, and time of day (morning and afternoon) and side (left and right) as within-subjects effects (α=.05) Multivariate analysis of variance revealed no significant differences in interocdusal tactile threshold between morning and afternoon or between the left and right sides in either group. Mean interocdusal tactile threshold for the bruxers was 17.1 ± 3.9 μm, while that for the non-bruxers was significantly greater at 29.9 ± 5.6 μm (P<001).The periodontal sensation in bruxers was increased compared to non-bruxers.Six subjects were divided into the non-bruxers (n=3) and the bruxers (n=3). Tooth displacement during denching were measured in the maxillary first molar using two dimensional tooth displacement transducer. For both the bruxers and non-bruxers, there were no differences in the direction of tooth displacement. When compared with the non-bruxers, the amount of displacement was tend to be higher in the bruxers.

磨牙症患者的牙周感觉和牙齿移位可能与非磨牙症患者不同，因为夜间可能会对牙齿施加过多的外力。本研究的目的是探讨磨牙对磨牙区牙周感觉及牙齿移位的影响。14名受试者分为非磨牙组（n=7）和磨牙组（n=7）。磨牙症是根据夜间咬肌肌电图的活动来确认的。牙周感觉是根据交叉触觉阈值评估的，这是指牙齿咬合面之间可以检测到的最小厚度。随机放置金属箔测量左、右两侧第一磨牙区域的交叉触觉阈值，每天（上午和下午）测量2次，共3天。多变量方差分析显示，磨牙（伴或不伴）为受试者间效应，时间（上午和下午）和侧面（左侧和右侧）为受试者内效应（α= 0.05）。多变量方差分析显示，两组患者的交叉触觉阈值在上午和下午、左右两侧之间无显著差异。磨牙组的平均交叉触觉阈值为17.1±3.9 μm，而非磨牙组的平均交叉触觉阈值为29.9±5.6 μm （P<001）。磨牙患者的牙周感觉较非磨牙患者明显增加。6名受试者分为非磨牙组（n=3）和磨牙组（n=3）。采用二维牙位移传感器测量上颌第一磨牙在牙切过程中的牙位移。磨牙组和非磨牙组在牙齿位移方向上没有差异。与非磨牙组相比，磨牙组的位移量更大。