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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 study whether there is any characteristic variation of tongue position in patients with open occlusion. Methods The method of tongue dorsal lipiodol angiography was used to increase the development of the dorsal tongue on the X-ray films. In the cephalometric X-ray films, the relative position of the tongue in the native oral cavity was used to determine the position of the tongue. Combined with the normal occlusal tongue position of the group t-test comparison to find out the characteristics of the tongue position of patients with open occlusion. Results Compared with the normal occlusion, the gap between the base of the tongue and the uvula increased, the gap between the dorsal surface of the tongue and the surface of the palate decreased, and the tip of the tongue was closer to the tooth. Conclusion There is a forward and upward change in the lingual position of the odontoid occlusion relative to that of the normal occlusion, which may be one of the causes of open occlusion.