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目的:研究两种咬合板治疗深覆(牙合)伴颞下颌关节不可复性盘前移位患者的疗效对比.方法:选择深覆(牙合)伴不可复性盘前移位患者28例,分为两组,稳定型咬合板(stable bite plate,SBP)组,观察对象19例,行SBP治疗;松弛型咬合板(relaxation splint,RS)组,观察对象9例,行RS治疗.观察患者治疗前及治疗后第2周、4周、6周、8周、12周疼痛分级指数(VAS)、最大开口度、关节弹响的变化以及CBCT影像学变化.结果:2组治疗后VAS值均明显低于治疗前,2组之间差异无统计学意义(P＞0.05).最大开口度及关节弹响均较治疗前有所改善,2组结果比较差异无统计学意义(P＞0.05).CBCT显示2组关节前间隙均较治疗前减小并且髁突表面有所改建.结论:对于深覆(牙合)伴不可复性盘前移位患者,SBP和RS均能缓解咀嚼肌紧张状态,并减轻疼痛,但是稳定型咬合板较松弛型咬合板适用范围广,临床应用较多.“,”Objective:To evaluate the stabilization splint (stable bite,plate,SBP) and relaxation splint (relaxation splint,RS) in treatment of deep overbite patients with nonreversible Anterior Disc Displacement of TMJ,and to compare the efficacy in patients with complex anterior disc displacement.Methods:28 Patients with deep overbite and complex anterior disc shifting were divided into two groups.The first group was SBP group,19 subjects treated with SBP,and the second group was RS group,9 subjects treated with RS.After 2 weeks,patients before and after treatment for 4 weeks,6 weeks,8 weeks,12 weeks of pain grading refers to The number (VAS),maximum opening,school change arthrosnap and CBCT images.Results:(1) the VAS value of the 2 groups after treatment were significantly lower than before treatment,no significant difference between the 2 groups (P＞0.05).(2) the maximum opening degree and the joints were better than before treatment,and no significant differences between the 2 groups (P＞0.05).(3) CBCT group joint gap was reduced significantly and there was certain condylar surface reconstruction.Conclusion:For patients with deep overbite complex anterior disc displacement,SBP and RS can relieve masticatory muscle tension,and relieve pain.The shape occlusal plate is wider than the loose occlusal plate,and SBP is more used in clinical practice