肌激动器治疗前后关节盘矢状位置与颞下颌关节临床症状和体征的关系

目的 探讨功能矫治中关节盘矢状位置对颞下颌关节临床功能的影响.方法 选择20个AngleⅡ1错(牙合)患者,采用Activator功能矫治器治疗.用MRI检查治疗前后关节盘位置, Helkimo指数评价功能矫形前后的颞下颌关节功能.探讨治疗前后关节盘位置的改变及其与颞下颌关节症状之间的关系.结果 治疗前关节盘位置正常者,治疗后临床检查指数有下降趋势;治疗前关节盘前移位者,治疗后临床检查指数升高.结论 功能矫形虽然不会导致关节盘前移位的发生,但对于治疗前已经存在关节盘前移位者,治疗后可能会引发或加重其TMD症状和体征.

Correlations between disc position and clinical symptoms of temporomandibular joint during Activator treatment

Objective To investigate the disc position before and after Activator treatment and the relation between disc position and the clinical symptoms of temporomandibular joint(TMJ)during the treatment.Methods Twenty Class II patients received activator treatment.Before and after Activator treatment,temporomandibular joint disc positions were measured in MRI images,and the function of TMJ was evaluated by Helkimo index.The correlations between disc position and the clinical symptoms of TMJ were analyzed.Results Dysfunction index in subjects with normal disc position decreased,but increased in subjects with disc anteriorly displaced.Conclusion Activator treatment does not cause disc anterior displacement of the TMJ,but it may induce and aggravate the symptoms of TMJ in those subjects with anteriorly displaced disc before treatment.