快速上颌扩弓儿童的肌电图评估
Electromyographic evaluation in children having rapid maxillary expansion.
作者信息
De Rossi Moara, De Rossi Andiara, Hallak Jaime Eduardo Cecílio, Vitti Mathias, Regalo Simone Cecílio Hallak
机构信息
Postgraduate student, Department of Pediatric Dentistry, Piracicaba School of Dentistry, State University of Campinas, São Paulo, Brazil.
出版信息
Am J Orthod Dentofacial Orthop. 2009 Sep;136(3):355-60. doi: 10.1016/j.ajodo.2007.08.027.
INTRODUCTION
The aim of this study was to analyze the electromyographic activity of the masseter and temporalis muscles of children having rapid maxillary expansion (RME) with a bonded rapid maxillary expansion appliance.
METHODS
The sample consisted of 27 children (mean age, 8.6 years) with posterior crossbite who required RME treatment. Electromyographic activity of the masseter and temporalis muscles was analyzed before treatment and after the appliance was removed. The mean interval between the 2 analyses was 5 months. Muscular activity was electromyographically analyzed in rest position, and with maximum voluntary dental clenching and chewing. Differences in the 2 measurements were evaluated by using paired t tests.
RESULTS AND CONCLUSIONS
Electromyographic analysis showed that activity of the masseter and temporalis muscles increased significantly after the expansion appliance was removed during rest, dental clenching, and habitual chewing.
引言
本研究的目的是分析使用粘结式快速上颌扩弓矫治器进行快速上颌扩弓（RME）的儿童咬肌和颞肌的肌电活动。
方法
样本包括27名需要进行RME治疗的后牙反合儿童（平均年龄8.6岁）。在治疗前和矫治器拆除后分析咬肌和颞肌的肌电活动。两次分析之间的平均间隔为5个月。在休息位、最大自主紧咬和咀嚼时通过肌电图分析肌肉活动。使用配对t检验评估两次测量的差异。
结果与结论
肌电图分析表明，在休息、紧咬和习惯性咀嚼时，拆除扩弓矫治器后咬肌和颞肌的活动显著增加。
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