Effects of the functional orthopaedic therapy on masticatory muscles activity.
Effects of the functional orthopaedic therapy on masticatory muscles activity.
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DOI：
10.4317/jced.53986
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发表时间：
2017-07
影响因子：
--
通讯作者：
Sforza C
中科院分区：
文献类型：
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作者：
Di Palma E;Tepedino M;Chimenti C;Tartaglia GM;Sforza C
本研究的目的是检查咀嚼肌表面肌电图（sEMG）活动前后的桑德矫形器功能矫形治疗。10例9-13岁的青少年（5女5男），角ⅱ类，ⅰ类错颌畸形，在功能矫形治疗前后进行肌电图分析。为了验证神经肌肉平衡，在最大自主握紧时记录左右咬肌和颞前肌的标准化肌电活动，并分析计算：POC（由咬合决定的肌肉活动对称分布指数）；TC（下颌扭矩存在指数）和Ac（咬合重心位置指数）。还计算了总肌肉活动。功能治疗前后的数据采用Wilcoxon sign - rank检验进行比较。治疗前，所有受试者均有良好的神经肌肉平衡，且未因治疗而改变。肌电图评估可以量化咬合对咀嚼肌活动的影响，并控制功能性矫形治疗保持良好的肌肉协调性。关键词：功能矫治器；桑德矫治器；肌电图；
The purpose of this study was to examine surface electromyographic (sEMG) activity of masticatory muscles before and after functional orthopaedic therapy with Sander appliance. Ten adolescents (5 girls, 5 boys) with an Angle Class II, division I malocclusion, 9-13 years old, were submitted to sEMG before and after functional orthopaedic therapy. To verify the neuromuscular equilibrium, the standardized EMG activities of right and left masseter and anterior temporal muscles were recorded during maximum voluntary clench, and analysed calculating: POC (index of the symmetric distribution of the muscular activity determined by the occlusion); TC (index of presence of mandibular torque) and Ac (index suggesting the position of occlusal barycentre). The total muscular activity was also calculated. Pre- and post- functional therapy data were compared with Wilcoxon Signed-Rank Test. Before treatment, all subjects had a good neuromuscular equilibrium, which was not altered by treatment. sEMG evaluations allow to quantify the impact of occlusion on masticatory muscle activity and to control that the functional orthopaedic therapy maintain a good muscular coordination. Key words:Functional appliance, Sander appliance, electromyography, masticatory muscles.