Department of Operative Dentistry, Periodontics, and Endodontics, Heinrich-Heine-University, Düsseldorf, Germany.
Int J Oral Sci. 2012 Sep;4(3):141-5. doi: 10.1038/ijos.2012.48. Epub 2012 Aug 31.
This study was conducted to verify the results of a preceding retrospective pilot study by means of a prospective controlled investigation including a larger sample size. Therefore, the aim of this clinical investigation was to analyze the relationship between sleep bruxism and several functional and occlusal parameters. The null hypothesis of this study was that there would be no differences among sleep bruxism subjects and non-sleep bruxism controls regarding several functional and occlusal parameters. Fifty-eight sleep bruxism subjects and 31 controls participated in this study. The diagnosis sleep bruxism was based on clinical criteria of the American Academy of Sleep Medicine. Sixteen functional and occlusal parameters were recorded clinically or from dental study casts. Similar to the recently published retrospective pilot study, with a mean slide of 0.77 mm (s.d., 0.69 mm) in the sleep bruxism group and a mean slide of 0.4 mm (s.d., 0.57 mm) in the control group, the evaluation of the mean comparison between the two groups demonstrated a larger slide from centric occlusion to maximum intercuspation in sleep bruxism subjects (Mann-Whitney U-test; P=0.008). However, following Bonferroni adjustment, none of the 16 occlusal and functional variables differed significantly between the sleep bruxism subjects and the non-sleep bruxism controls. The present study shows that the occlusal and functional parameters evaluated do not differ between sleep bruxism subjects and non-sleep bruxism subjects. However, as the literature reveals a possible association between bruxism and certain subgroups of temporomandibular disorders, it appears advisable to incorporate the individual adaptive capacity of the stomatognathic system into future investigations.
本研究旨在通过前瞻性对照研究验证先前回顾性试点研究的结果，该研究纳入了更大的样本量。因此，本临床研究的目的是分析磨牙症与若干功能和咬合参数之间的关系。本研究的零假设是，在若干功能和咬合参数方面，磨牙症患者与非磨牙症对照组之间没有差异。本研究共纳入 58 例磨牙症患者和 31 例对照组。磨牙症的诊断基于美国睡眠医学学会的临床标准。16 项功能和咬合参数通过临床记录或从牙模记录。与最近发表的回顾性试点研究相似，磨牙症组的平均滑动距离为 0.77mm（标准差为 0.69mm），对照组的平均滑动距离为 0.4mm（标准差为 0.57mm），两组间的平均比较评估表明，磨牙症患者从中切牙合到最大牙尖交错位的滑动距离更大（Mann-Whitney U 检验；P=0.008）。然而，经 Bonferroni 校正后，磨牙症患者和非磨牙症对照组之间的 16 项咬合和功能变量均无显著差异。本研究表明，评估的咬合和功能参数在磨牙症患者和非磨牙症患者之间没有差异。然而，正如文献显示磨牙症与某些颞下颌关节紊乱亚组之间可能存在关联一样，似乎有必要将口腔颌面部系统的个体适应能力纳入未来的研究中。
