摘要
目的研究高角儿童在不同下颌运动时面颈部肌肉的肌电活动情况。方法用BioEMGⅡ型肌电图仪同步记录14名高角儿童和16名均角儿童在不同下颌运动时双侧颞肌前束(TA)、咬肌(MM)、胸锁乳突肌(SCM)和二腹肌前腹(DA)的肌电活动。结果下颌息止位时,高角组TA、DA和SCM的肌电活动低于均角组,有统计学意义(P<0.01,P<0.05);最大紧咬时,高角组TA和MM的肌电活动低于均角组,有统计学意义(P<0.05);咀嚼口香糖时,高角组MM的肌电活动低于均角组,有统计学意义(P<0.05);吞咽时高角组DA的肌电活动低于均角组,有统计学意义(P<0.05)。结论不同下颌运动时,高角儿童和均角儿童面颈部肌肉的肌电活动差异有所不同;面颈部肌肉的肌电活动可能与颅面垂直形态有关。
Objective：To investigate the electromyography activities of the facial and neck muscles during mandibular movement in children with high-angle. Methods：A computer-integrated BioEMG Ⅱ diagnostic system was used to synchronously record the electromyography activities of temporal anterior（ TA）, masseter muscle（ MM ）, stemocleidomastoid（SCM） and digastric anterior（DA） muscles during mandibular movement in 14 children with high-angle and 16 children with normal-angle. Results： Muscular activity of TA, DA and SCM in children with high-angle was significantly weaker than that in those with normal-angle in the rest position（ P 〈 0.01 or P 〈 0.05 ）. Activity of TA and MM in chil- dren with high-angle was significantly weaker than that in those with normal-angle in maximum clenching（ P 〈0.05 ）. MM showed significantly weaker activity in children with high-angle than that in those with normal-angle in the chewing gum movement（ P 〈 0.05 ）. DA showed significantly weaker activity in children with high-angle than that in those with normal-angle in swallow （ P 〈 0.05 ）. Conclusion： The electromyography activities of the facial and neck muscles during mandibular movement in children with high-angle are significantly different from those in children with normal-angle. The difference may be related to vertical craniofacial morphology.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2006年第2期195-198,共4页
Journal of Practical Stomatology
关键词
肌电描记术
高角
面部肌肉
下颌运动
Electromyography
High-angle
Facial muscle
Mandibular movement
