转化学医电子杂志
轉化學醫電子雜誌
전화학의전자잡지
2014年
1期
14-19
,共6页
王晓瑞%张渊%许毅飞%王美青
王曉瑞%張淵%許毅飛%王美青
왕효서%장연%허의비%왕미청
咬合接触%咬合力%升颌肌%T-Scan%肌电
咬閤接觸%咬閤力%升頜肌%T-Scan%肌電
교합접촉%교합력%승합기%T-Scan%기전
occlusal contact%bite force%jaw-closing muscle%T-Scan%electromyography
目的：探讨正常牙合受试者在最大紧咬时升颌肌肌电活动是否随咬合力的升高而增强。方法：应用T-Scan III咬合分析和BioEMG III肌电记录系统对16名男性无症状正常牙合受试者的咬合力、咬合接触及双侧颞肌前束（TA ）、咬肌（MM）肌电进行同步记录。结果：在ICP （intercuspal position，牙尖交错位）作快速最大紧咬时，咬合接触点在双侧牙弓逐渐趋于平衡分布，且在咬合接触点数增加、咬合力增大的末期，升颌肌电位呈现出下降的特征；在对刃位及左、右侧颌位作最大紧咬时，随着咬合力的升高，对刃位时双侧MM肌电活动逐渐升高，而左、右侧合位时工作侧TA及非工作MM肌电活动出现升高，在整个咬合力升高过程中未见肌电幅值的下降。结论：ICP最大紧咬时可出现较低水平的肌电活动并对应较高的咬合力水平的情况，反应了此时升颌肌功能活动的效率较高。这意味着在咬合运动中为达到一定水平的咬合力需要额外的肌肉活动来实现，这种额外肌电活动的长时间存在可能会引起升颌肌出现疲劳甚至出现口颌面疼痛症状。
目的：探討正常牙閤受試者在最大緊咬時升頜肌肌電活動是否隨咬閤力的升高而增彊。方法：應用T-Scan III咬閤分析和BioEMG III肌電記錄繫統對16名男性無癥狀正常牙閤受試者的咬閤力、咬閤接觸及雙側顳肌前束（TA ）、咬肌（MM）肌電進行同步記錄。結果：在ICP （intercuspal position，牙尖交錯位）作快速最大緊咬時，咬閤接觸點在雙側牙弓逐漸趨于平衡分佈，且在咬閤接觸點數增加、咬閤力增大的末期，升頜肌電位呈現齣下降的特徵；在對刃位及左、右側頜位作最大緊咬時，隨著咬閤力的升高，對刃位時雙側MM肌電活動逐漸升高，而左、右側閤位時工作側TA及非工作MM肌電活動齣現升高，在整箇咬閤力升高過程中未見肌電幅值的下降。結論：ICP最大緊咬時可齣現較低水平的肌電活動併對應較高的咬閤力水平的情況，反應瞭此時升頜肌功能活動的效率較高。這意味著在咬閤運動中為達到一定水平的咬閤力需要額外的肌肉活動來實現，這種額外肌電活動的長時間存在可能會引起升頜肌齣現疲勞甚至齣現口頜麵疼痛癥狀。
목적：탐토정상아합수시자재최대긴교시승합기기전활동시부수교합력적승고이증강。방법：응용T-Scan III교합분석화BioEMG III기전기록계통대16명남성무증상정상아합수시자적교합력、교합접촉급쌍측섭기전속（TA ）、교기（MM）기전진행동보기록。결과：재ICP （intercuspal position，아첨교착위）작쾌속최대긴교시，교합접촉점재쌍측아궁축점추우평형분포，차재교합접촉점수증가、교합력증대적말기，승합기전위정현출하강적특정；재대인위급좌、우측합위작최대긴교시，수착교합력적승고，대인위시쌍측MM기전활동축점승고，이좌、우측합위시공작측TA급비공작MM기전활동출현승고，재정개교합력승고과정중미견기전폭치적하강。결론：ICP최대긴교시가출현교저수평적기전활동병대응교고적교합력수평적정황，반응료차시승합기공능활동적효솔교고。저의미착재교합운동중위체도일정수평적교합력수요액외적기육활동래실현，저충액외기전활동적장시간존재가능회인기승합기출현피로심지출현구합면동통증상。
AIM:To find out whether the level of the surface electromyographic (SEMG)activity of jaw-closing muscles increa-ses when biting forces elevated during maximal voluntary clenc-hing (MVC).METHODS:In the present study,T-Scan III sys-tem and BioEMG III system were used to record bite force,occlu-sal contacts and SEMG activity of the anterior temporalis (TA) and of the masseter muscles (MM)simultaneously.Recordings were obtained from 16 healthy young adult males during different conditions:① a fast MVC from resting position to intercuspal po-sition (ICP);② a fast MVC in protrusive and lateral edge-to-edge positions.RESULTS:A higher level of SEMG activity was associated with a higher bite force during MVC (P <0.05 ). However,during fast MVC from rest to ICP the largest number of occlusal contacts were achieved and distributed more symmetrical-ly,the highest level of biting force was obtained,but the SEMG activity of the jaw elevator muscles was reduced compared with its maximum level (P<0.05 ).This phenomenon was not observed during the fast MVC in protrusive or lateral edge-to-edge posi-tions.CONCLUSION:The present results that a lower SEMG activity was associated with the largest number of occlusal contacts and the highest level of bite force during MVC in centric demon-strated a complex integration of jaw closing muscles when a stable occlusion is present.
