单侧咬合接触对咬肌和颞肌正中咬合最大紧咬电位的影响  

The influence of unilateral occlusal contact condition on the central biting electromyography activity of masseter and temporalis-anterior muscles

作　　者：郭富平 王美青[2] 马平 吴军正[2] 王静[2] 

机构地区：[1]疏勒陆军第十二医院口腔科 [2]第四军医大学口腔医学院

出　　处：《实用口腔医学杂志》2004年第4期403-406,共4页Journal of Practical Stomatology

基　　金：国家自然科学基金项目 NO 39370 1 95 ;国家教育部骨干教师资助计划资助

摘　　要：目的 :检测单侧咬合接触状态下最大紧咬时 ,双侧咬肌和颞肌前束的电位活动 ,探讨此二肌的功能特点。方法 :9名正常男性大学生 ,采用EM2型肌电仪检测自然状态下正中最大紧咬和单侧咬合接触 (一侧咬棉条 ,另一侧咬合不接触 )状态下正中最大紧咬时 ,双侧咬肌和颞肌前束的电位。结果 :自然状态下正中最大紧咬时 ,双侧颞肌前束肌、双侧咬肌肌电值均无显著差异 (P >0 0 5 ) ;单侧咬合接触正中最大紧咬时 ,咬合接触对侧颞肌前束肌电值明显降低 (P <0 0 5 ) ,咬肌肌电值无明显变化 (P >0 0 5 )。结论 :正中咬合时 ,是否有咬合接触关系对颞肌前束的肌电活动有明显影响 ,而对咬肌的肌电活动无明显影响。Objective:To investigate the functional characteritics of masseter and temporalis anterior muscle by testing the central biting electromyography(EMG) activity in the condition of unilateral occlusal contact. Methods:with EM2 electromyograph equipment bilateral masseter and temporalis-anterior muscles of 9 university male students were tested under the following two conditions:① biting maximally in mandibular intercuspal position(ICP); ②biting a peice of cotton maximally in ICP between upper and lower dentition on one side ,leaving the other side disoccluded. Resuts:During ICP maximal biting no difference was found in EMG activity between bilateral temporalis-anterior muscles or between bilateral masseters (P>0.05).During unilateral contact maximal biting EMG activity of the temporalis-anterior muscle on the bitting-side was higher than that on the disoccluded side(P<0.05); that of masseter muscle between two sides showed no significant difference (P>0.05).Conclusion: Vertical distance occlusion contact may affect the EMG activity of temporalis-anterior muscle but not on that of masseter muscle during the central biting.

关 键 词：肌电描记术 咬肌 颞肌 牙HE 

分 类 号：R780.2[医药卫生—口腔医学]