目的：探讨安氏Ⅱ类错牙合畸形伴颞下颌关节紊乱病( temporomandibular disorders,TMD)患者在经RW-splint治疗1周和2个月后二腹肌前腹肌电活动的改变,为治疗此类患者提供依据。方法 RW-splint戴入成功后,采用BioPAK系统的EMGⅡ型表面肌电测量仪分别对患者治疗前及RW-splint治疗后1周、2个月的二腹肌前腹肌电活动进行检测。结果 RW-splint治疗1周后患者的二腹肌前腹在吞咽位时肌电幅值差异均无统计学意义(P>0.05)；治疗2个月后患者吞咽位时二腹肌前腹的肌电幅值均降低,差异有统计学意义(P<0.05),在下颌姿势位治疗前后差异无统计学意义(P>0.05)。结论 RW-splint必须加长戴用时间才能改变二腹肌前腹的肌电值。%[Absteract] Objective The investigate the change of the electromyographic activity about digastrics anterior after RW-splint treatment for one week and two monthsin order to offer the theoretic basis for class Ⅱ malocclusion deformity patients with temporomandibular disorders ( temporomandibular, disorders, TMD) . Methods After wearing RW-splint successfully, the electromyographic activities of diagastric anterior before and 1 weeks , 2 months after RW-splint treat-ment were detected by EMG Ⅱ type surface EMG measuring instrument with BioPAK system. Results There was no statistically difference exist ( P>0. 05) in the EMG records of digastric anterior muscle during swallowing position after one week's RW-splint treatment. After 2 months treatment compared with pre-treatment, EMG records of digastric anterior muscle during swallowing position were decreased respectively, which showed remarkable significance ( P<0. 05) . How-ever, after 1 week, 2 months treatment compared with pre-treatment, EMG records of digastric anterior during MMP, which showed no statistically signifcant difference ( P >0. 05) . Conclusion Extension time of RW-splint worn can change the electromyographic activity of digastrics anterior.
展开▼
