Rasheed S A, Prabhu N T, Munshi A K
Department of Pedodontics and Preventive Dentistry, A.B. Shetty Memorial Institute of Dental Sciences, Mangalore, India.
J Clin Pediatr Dent. 1996 Winter;20(2):127-32.
Muscle thickness and activity of masseter and anterior temporalis muscles in children with Class I molar occlusion having normal anterior relation, anterior deep-bite and anterior open-bite were measured using ultrasonographic and electromyographic techniques. The results demonstrated an increased muscle thickness in the deep-bite followed by open-bite subjects. Muscle activity was high in the same groups. A significant correlation between thickness and activity was noted only in the anterior temporalis muscle of subjects with normal anterior relation. Activity index indicated that masseter contributed to the higher activity in the clenching effort.
采用超声和肌电图技术，测量了具有正常前牙关系、前牙深覆合和前牙开合的Ⅰ类磨牙咬合儿童的咬肌和颞肌前部的肌肉厚度及活动情况。结果表明，深覆合组和开合组的肌肉厚度增加。相同组别的肌肉活动较高。仅在具有正常前牙关系的受试者的颞肌前部，观察到厚度与活动之间存在显著相关性。活动指数表明，咬肌在紧咬用力时的活动较高。
