Tokiwa Osamu, Park Byung-Kyu, Takezawa Yasumasa, Takahashi Youichi, Sasaguri Kenichi, Sato Sadao
Dept. of Craniofacial Growth and Development Dentistry, Div. of Orthodontics, Kanagawa Dental College, 82 Inaokacho, Yokosuka 238-8580, Japan.
Cranio. 2008 Oct;26(4):287-93. doi: 10.1179/crn.2008.039.
Tooth grinding during sleep is thought to be one of the important factors causing oral diseases. However, no evidence is available regarding the relationship between the dental status and tooth contact during sleep bruxism. The purpose of this clinical study was to investigate the relationship between oral diseases and tooth grinding patterns during sleep bruxism. Fifty subjects (21 men and 29 women) were selected. The clinical attachment level, tooth mobility, noncarious cervical lesion (NCL) and hypersensitivity were examined in each tooth. Subjects wore a bruxism-recording device to visualize the grinding pattern during sleep bruxism. The grinding pattern was categorized into laterotrusive grinding (LG) and mediotrusive side grinding (MG). Furthermore, LG was divided into three types: incisor-canine (IC), incisor-canine-premolar (ICP), and incisor-canine-premolar-molar (ICPM) types. The average attachment level and tooth mobility of the ICPM and ICPM+MG types were much more aggravating than those of the IC or ICP types. The NCL encountered in the ICPM type was more aggravating than the other types. The average NCL of the ICPM type was significantly larger than that of the IC (p = 0.01), the ICP (p = 0.05), the ICP+MG (p = 0.05) and the ICPM+MG (p = 0.05) types and MG (p = 0.01). The average hypersensitivity of the ICP type was significantly greater than that of the IC type (p = 0.05). There was a moderate correlation between the attachment level and mobility. It was concluded that grinding patterns during sleep bruxism should be considered as a probable causative factor in the development of dental problems related to clinical attachment level, tooth mobility, NCL, and hypersensitivity, especially the ICPM type and mediotrusive grinding that seems to be the pattern that could more easily deteriorate the dental condition.
睡眠磨牙被认为是导致口腔疾病的重要因素之一。然而，关于睡眠磨牙症期间牙齿状况与牙齿接触之间的关系尚无证据。本临床研究的目的是调查睡眠磨牙症期间口腔疾病与磨牙模式之间的关系。选取了50名受试者（21名男性和29名女性）。检查每颗牙齿的临床附着水平、牙齿松动度、非龋性颈部病变（NCL）和牙齿敏感情况。受试者佩戴磨牙记录装置以观察睡眠磨牙症期间的磨牙模式。磨牙模式分为侧向磨耗（LG）和正中侧向磨耗（MG）。此外，LG又分为三种类型：切牙-尖牙（IC）型、切牙-尖牙-前磨牙（ICP）型和切牙-尖牙-前磨牙-磨牙（ICPM）型。ICPM型和ICPM+MG型的平均附着水平和牙齿松动度比IC型或ICP型严重得多。ICPM型出现的NCL比其他类型更严重。ICPM型的平均NCL显著大于IC型（p = 0.01）、ICP型（p = 0.05）、ICP+MG型（p = 0.05）、ICPM+MG型（p = 0.05）和MG型（p = 0.01）。ICP型的平均牙齿敏感程度显著高于IC型（p = 0.05）。附着水平和松动度之间存在中度相关性。得出的结论是，睡眠磨牙症期间的磨牙模式应被视为与临床附着水平、牙齿松动度、NCL和牙齿敏感相关的牙齿问题发展的一个可能致病因素，尤其是ICPM型和正中侧向磨耗，后者似乎是更容易使牙齿状况恶化的模式。
