牙齿重度磨耗患者咀嚼肌肌电的实验研究  

Surface electromyogrphy analysis of masticatory muscles in the cases with severe tooth wear

作　　者：刘波 姚月玲[2] 张旻 张俊华[2] 

机构地区：[1]厦门第174医院口腔医疗中心,361003 [2]西安第四军医大学口腔医学院

出　　处：《实用口腔医学杂志》2003年第5期421-423,共3页Journal of Practical Stomatology

摘　　要：目的 :研究重度牙齿磨耗 (TW )患者咀嚼肌的肌电活动 ,探讨不同类型牙合磨耗患者咀嚼肌受损的肌电表现。方法 :以 15例中老年重度牙齿磨耗患者为研究对象 ,通过肌电图仪 (EMG)测试下颌姿势位和牙尖交错位最大紧咬时颞肌前束 (TA)、咬肌 (MM )、二腹肌前腹 (DA )的肌电幅值 ;并以 8例正常牙合患者的咀嚼肌肌电幅值作为对照。结果 :姿势位时 ,磨耗Ⅰ、Ⅱ、Ⅲ组患者TA、MM、DA的平均肌电幅值高于对照组 ,TA、MM的肌电幅值增高显著大于对照组 (P <0 .0 1) ;ICP最大紧咬时 ,Ⅰ、Ⅱ、Ⅲ组患者TA、MM、DA平均肌电幅值降低 ,MM、DA肌电幅值与对照组比较有显著性差异 (分别为P <0 .0 1,P <0 .0 5 )。结论 :牙齿磨耗患者有肌紧张存在 。Objective: To study the masticatory muscles activity in the cases with severe tooth wear(TW) and the damaged display of masticatory muscles in different types of occlusal wear. Methods: The electromyography(EMG) of bilateral anterior temporalis(TA), masseter muscle(MM) and anterior digastric(DA) was taken in 15 elder patients aged 49～69 years old with TW, the EMG of the patients was compared with that of 8 healthy subjects aged 49～55 years old. Results: TW patients showed higher activity of TA,MM and DA in mandibular postural position than the controls (P<0.01 in the comparison of TA or MM between the two groups); During maximal clenching in intercuspal position,the patients showed lower activity of MM (P<0.01) and DA (P<0.05) than the controls. Conclusion: TW patients have muscular tension.

关 键 词：牙齿磨耗 TW 咀嚼肌 肌电活动 实验 肌电图 EMG 

分 类 号：R780.2[医药卫生—口腔医学]