Tecco S, Caputi S, Festa F
Department of Oral Science, University G.D'Annunzio, Chieti/Pescara, Italy.
J Oral Rehabil. 2007 Jul;34(7):478-86. doi: 10.1111/j.1365-2842.2007.01724.x.
The electromyographic pattern activity of masticatory, neck and trunk muscles was assessed using surface electromyography (sEMG) in 60 Caucasian adult females (20 subjects in skeletal class I, 20 subjects in skeletal class II and 20 subjects in skeletal class III), classified on the base of their skeletal class (ANB angle), corrected on the base of maxillary and mandibular rotations. The sEMG activity was recorded at mandibular rest position and during maximal voluntary clenching. At mandibular rest position, the sEMG activities of masseter and anterior temporal muscles were significantly higher in class III subjects than in class I and class II subjects, that showed no significant difference between them. Then, the sEMG activities of posterior cervicals and upper trapezius were significantly higher in skeletal class III subjects than in the other two groups. During maximal voluntary clenching, no significant difference was observed in the sEMG activity of masticatory muscles among the three considered groups. However, the sEMG activities of posterior cervicals and upper trapezius were significantly higher in skeletal class III subjects than in the other two groups, which showed no significant difference between them. In conclusion, the skeletal class seems to affect the sEMG pattern activity of masticatory, neck and trunk muscles.
在60名成年白人女性中,根据其骨骼类型(ANB角)并基于上颌和下颌旋转进行校正,将其分为骨骼I类、骨骼II类和骨骼III类(每组20名受试者),使用表面肌电图(sEMG)评估咀嚼肌、颈部和躯干肌肉的肌电模式活动。在下颌休息位和最大自主紧咬时记录sEMG活动。在下颌休息位时,III类受试者咬肌和颞前肌的sEMG活动明显高于I类和II类受试者,而I类和II类受试者之间无明显差异。然后,III类骨骼受试者颈后部和斜方肌上部的sEMG活动明显高于其他两组。在最大自主紧咬时,三组受试者咀嚼肌的sEMG活动未观察到明显差异。然而,III类骨骼受试者颈后部和斜方肌上部的sEMG活动明显高于其他两组,而其他两组之间无明显差异。总之,骨骼类型似乎会影响咀嚼肌、颈部和躯干肌肉的sEMG模式活动。