Alexander S, Sudha P
Department of Pedodontics, College of Dental Surgery (KMC), Mangalore, India.
J Clin Pediatr Dent. 1997 Spring;21(3):213-22.
Twenty schoolchildren between the age groups of 12-14 years with permanent dentition were the subjects of this study. Group A comprised of ten subjects with Angle's Class I occlusion. Group B consisted of ten subjects having Angle's Class I occlusion with anterior open bite and simple tongue thrust swallow pattern. Evaluation of electrical activity of genioglossus muscle and associated arch dimensional changes were performed in both groups A and B. Frequency of electrical activity of the genioglossus muscle and duration of swallow was found to be significantly higher in tongue thrusters than in the normal subjects. No statistically significant changes were observed in both upper and lower arches of Groups A and B in terms of bimolar and bipremolar width and palatal depth. A significant increase in the extent of anterior teeth proclination in the upper arch in the tongue thrust individuals was attributed to the effect of the increased frequency of electrical activity of the genioglossus muscle and prolonged duration of swallow.
本研究以20名年龄在12至14岁之间的恒牙列学童为对象。A组由10名安氏I类咬合的受试者组成。B组由10名患有安氏I类咬合且伴有前牙开颌和单纯吐舌吞咽模式的受试者组成。对A组和B组的颏舌肌电活动及相关牙弓尺寸变化进行了评估。发现吐舌者颏舌肌电活动频率和吞咽持续时间显著高于正常受试者。在A组和B组的上下牙弓中，就双尖牙和双前磨牙宽度及腭深度而言，未观察到统计学上的显著变化。吐舌个体上牙弓前牙倾斜程度的显著增加归因于颏舌肌电活动频率增加和吞咽持续时间延长的影响。
