Miralles R, Hevia R, Contreras L, Carvajal R, Bull R, Manns A
Department of Physiology and Biophysics, Faculty of Medicine, University of Chile, Santiago.
Angle Orthod. 1991 Winter;61(4):277-84. doi: 10.1043/0003-3219(1991)061<0277:POEAIS>2.0.CO;2.
Integrated electromyographic activity of masseter and anterior temporal muscles was recorded using bipolar surface electrodes in 33 young adults. Subjects were skeletally classified according to ANB angle reading corrected both for maxillary position and rotation of the jaw. Postural activity for both muscles was higher in Class III subjects than in Class I and Class II, whereas in Class I and II subjects activity was similar. During swallowing, masseter muscle activity in Class III subjects was higher than Classes I and II, whereas anterior temporal muscle activity was not different between Classes III and I. During maximal voluntary clenching, activity was not different among classes. High correlations between electromyographic activity and corrected ANB angle as well as with overjet were observed. Skeletal classification used in the present study may have clinical relevance regarding treatment and prognosis, as well as in the assessment of the relationship between muscular activity and craniofacial characteristics.
使用双极表面电极记录了33名年轻成年人咬肌和颞前肌的综合肌电图活动。根据对上颌位置和下颌旋转进行校正后的ANB角读数，对受试者进行骨骼分类。III类受试者的这两块肌肉的姿势活动高于I类和II类受试者，而I类和II类受试者的活动相似。吞咽时，III类受试者的咬肌活动高于I类和II类受试者，而III类和I类受试者的颞前肌活动没有差异。最大自主紧咬时，各分类之间的活动没有差异。观察到肌电图活动与校正后的ANB角以及覆盖之间存在高度相关性。本研究中使用的骨骼分类可能在治疗和预后方面以及在评估肌肉活动与颅面特征之间的关系方面具有临床相关性。
