[下颌前突患者胸锁乳突肌和咀嚼肌的肌电活动]
[Electromyographic activity of sternocleidomastoid and masticatory muscle in patients with prognathism].
作者信息
Li Bo, Lu Li
机构信息
Dept. of Oral Anatomy and Physiology, School of Stomatology, China Medical University, Shenyang 110002, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2011 Apr;29(2):139-41.
OBJECTIVE
To investigate the electromyographic activities of anterior temporalis (TA), masseter muscle (MM), digastric anterior (DA), sternocleidomastoid (SCM) at postural position (MPP) and various mandibular movements in prognathic patients.
METHODS
Thirty-two patients with prognathism were selected from the clinic of oral and maxillofacial surgery of China Medical University. 36 healthy college students with normal occlusion were selected as normal controls. A BioEMG II diagnostic system with BioFLEX surface electrode was used to record the electromyographic activities of the above muscles.
RESULTS
Compared with the control group, the electromyographic activities of TA, SCM and DA in prognathic patients were higher in MPP. The electromyographic activities of TA, MM were significantly lower than the control group in clenching (P < 0.01). In protrusion, the electromyographic activities of TA, MM and SCM in prognathic patients were higher than the control group (P < 0.01). In retrusion, the electromyographic activities of TA, SCM in prognathic patients were higher than the control group (P < 0.01).
CONCLUSION
The masticatory muscles electromyographic activity of prognathism is abnormal.
目的
研究前突患者在姿势位（MPP）及各种下颌运动时颞肌前束（TA）、咬肌（MM）、二腹肌前腹（DA）、胸锁乳突肌（SCM）的肌电活动。
方法
从中国医科大学口腔颌面外科门诊选取32例前突患者。选取36名咬合正常的健康大学生作为正常对照。使用配备BioFLEX表面电极的BioEMG II诊断系统记录上述肌肉的肌电活动。
结果
与对照组相比，前突患者在姿势位时TA、SCM和DA的肌电活动较高。在紧咬时，前突患者TA、MM的肌电活动显著低于对照组（P < 0.01）。在前伸时，前突患者TA、MM和SCM的肌电活动高于对照组（P < 0.01）。在后退时，前突患者TA、SCM的肌电活动高于对照组（P < 0.01）。
结论
前突患者咀嚼肌的肌电活动异常。
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