开患者舌位置变化研究

Study on tongue positions of open bite patients

目的 研究开牙合患者的舌位置有无特征性变异。方法 利用舌背碘油造影方法 ,增加头颅侧位定位X线片上舌背的显影效果 ,在头颅侧位定位X线片上以舌体在固有口腔内的相对位置确定舌体的位置 ,通过开牙合与正常牙合者舌位置的团体t检验比较 ,找出开牙合患者的舌位置变异特征。结果 开牙合患者与正常牙合者比较 ,舌根部与悬雍垂之间的间隙增大 ,舌背部与腭表面之间的间隙减小 ,舌尖部更靠近牙齿。结论 开牙合个体相对于正常牙合个体舌位置有向前、向上的变化特点 ,这可能是开牙合的病因之一。

Objective To explore whether there is any abnormality in the tongue position of the open bite. Methods Tongue position was defined as the relative position of its body in the oral proper cavity on profile cephalometric roentgenogram which was enhanced by the iodine oil applied to the tongue surface. The tongue position was compared between open bite group and normal bite group with student's t test to determine the variation of open bite. Results Compared to the normal bite group, the root of tongue was closer to the uvula in the open bite group, and the distance between the dorsum of tongue and the surface of palate was decreased as well as the tip of tongue was nearer to the incisors. Conclusion The open bite's tongue position is characterized by more upward and more forward and this position may be one of the causes of open bite.