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目的:观察弹性(牙合)垫对夜磨牙症(sleep bruxism,SB)患者咬合及睡眠特征的改善效果.方法:选取以2015年1月~2017年10月接受弹性(牙合)垫治疗的14例SB患者为观察组,及14例健康对象为对照组.对比分析两组咬合特征,睡眠特征及临床疗效.结果:治疗前观察组闭合时间(OT)、左侧及右侧分离时间(DT)明显长于对照组,(牙合)力中心点(COF)左右向偏移明显长于对照组,右侧(牙合)力半分比(POF)明显低于对照组,力不对称指数(AOF)明显高于对照组,每小时咀嚼肌节律性收缩(rhythmic masticatory muscle activity,RMMA)次数明显多于对照组,上述差异均有统计学意义(P<0.05).经治疗后,观察组OT、左侧DT明显缩短,COF左右向偏移明显减小,左侧POF明显下降,右侧POF明显升高,AOF明显减少,每小时磨牙及RMMA次数明显减少,Molina磨牙症评分明显改善,组内差异均有统计学意义(P<0.05).经治疗后,观察组右侧DT仍明显高于对照组,RMMA次数仍明显多于对照组,差异有统计学意义(P<0.05).结论:SB患者普遍存在咬合特征变化,其睡眠结构与正常人相似,但RMMA次数增加.应用弹性(牙合)垫能够有效纠正患者咬合特征,减少RMMA次数,并改善SB症状.“,”Objective:To investigate the effect of elastic occlusal pad onthe features of occlusal and sleep in patients with sleep bruxism(SB).Methods:Forteen patients with SB treated by elastic occlusal pad during January 2015 to October 2017 were involved as the observation group,and 14 health people were recruited as the control group.The differences be-tween 2 groups and inter observation group were observed.Results:Before treatment,the occlusion time(OT),disclusion time (DT)from left and right in the observation group were much longer than those in the control group,left and right offset of cen-ter of force(COF)in the observation group was much longer than it in the control group,percentage of occlusal force(POF)in right was much less than it in the control group,asymmetry index of occlusal force(AOF)was much more than it in the control group,hythmic masticatory muscle activity(RMMA)per hour in the observation group was much more than it in the control group,these differences were statistically significant(P<0.05).After treatment,in the observation group,OT,DT from left shortened significantly,left and right offset of COF decreased significantly,POF in left decreased significantly,POF in right increased significantly,AOF decreased significantly,RMMA and bruxism per hour decreased significantly,Molina score im-proved significantly,these inter observation group differences were statistically significant(P <0.05).After treatment,DT from left in the observation group was still higher than that in the control group,RMMA per hour in the observation group was still more than that in the control group,these differences were statistically significant(P<0.05).Conclusion:Changes of occlusal characteristics are common in SB patients,but their sleep structure is similar with normal people,while the number of RMMA increases.The application of elastic occlusal pad can effectively correct the occlusal characteristics,reduce the num-ber of RMMA and lessen the symptoms of SB.