偏侧咀嚼者咀嚼肌肌电特征分析  

Analysis of EMG Characteristics of Patients with Unilateral Mastication

作　　者：贾玲[1] 王云[1] 邓超[1] 

机构地区：[1]皖南医学院口腔医学院,安徽芜湖241002

出　　处：《辽宁医学院学报》2015年第6期17-19,22,共4页Journal of Liaoning Medical University (LNMU) Bimonthly

基　　金：芜湖市科技计划项目;项目编号:2012cxy16;皖南医学院重点科研培育基金项目;项目编号:wk2013Z09

摘　　要：目的分析偏侧咀嚼者在下颌运动中的肌电特征。方法通过咀嚼肌表面肌电图(Electromyogram,EMG)检测技术,比较偏侧咀嚼和正常咀嚼人群在下颌姿势位(Mandibular Postural Position,MPP)、最大张口运动和咀嚼运动中咬肌(MM)和二腹肌前腹(DA)的肌电情况,进行统计分析。结果 (1)偏侧咀嚼组大张口运动中左二腹肌前腹(LDA)、右二腹肌前腹(RDA)平均肌电峰值低于双侧咀嚼组(P<0.05),咀嚼运动中左咬肌(LMM)平均肌电峰值低于双侧咀嚼组(P<0.05);(2)偏侧咀嚼组在MPP、最大张闭口运动和咀嚼运动中MM活动不对称指数高于双侧咀嚼组(P<0.05),MPP、咀嚼运动时DA活动对称性低于双侧咀嚼组(P<0.05)。结论长期偏侧咀嚼造成了MM和DA对称性的改变,咀嚼肌做功下降。Objective To analyze the EMG characteristics of unilateral mastication patients in opening and closing movement. Methods By the detection technology of chewing muscle surface electromyography （EMG） , EMG characteristics of mandibular pos- tural position （MPP）, maximum opening movement and chewing movement in masseter （MM） and digastric anterior （DA） were com- pared between those of unilateral mastication and those of the normal mastication. The results were used for statistical analysis. Results （ 1 ） Average electrical peak of LDA and RDA at maximum opening and closing movement of the unilateral chewing group were lower than those of the bilateral chewing group （ P 〈 0. 05 ）. Average electrical peak of LMM during chewing of the unilateral chewing group was lower than that of the bilateral chewing group （ P 〈 0. 05 ）. （2） MM movement during MPP, maximum opening and closing move- ment and chewing of the unilateral chewing group were higher than those of the bilateral chewing group （ P 〈 0. 05 ）. DA activity sym- metry during MPP and chewing of the unilateral chewing group were lower than that of the bilateral chewing group （ P 〈 0. 05 ）. Con- clusions Long -term unilateral chewing leads to symmetry changes of MM and DA, and results in declining of masticatory muscle power

关 键 词：偏侧咀嚼 张闭口运动 咀嚼运动 肌电图 

分 类 号：R783[医药卫生—口腔医学]