安氏Ⅲ类错牙合畸形矫治前后舌体位置及舌骨位置的比较研究

Comparative study of the position of tongue and hyoid bone before and after orthodontic treatment of angle class Ⅲ patients

目的:比较安氏Ⅲ类错牙合畸形患者非手术矫治前后舌体位置及舌骨位置。方法:对26例安氏Ⅲ类错牙合畸形患者舌背涂有硫酸钡糊剂的非手术患者矫治前后拍摄头侧位X光片并在舌背涂抹硫酸钡糊剂,选择舌体及舌骨的17个点进行描记,对13个测量值进行分析统计。结果:舌体形态(O-T1,T3,T4,T5,T7)改变有统计学意义(P<0.05);舌长变短有统计学意义(P<0.05);舌高增加有统计学意义(P<0.01);舌骨前移有统计学意义(P<0.05)。结论:安氏Ⅲ类错牙合非手术畸形矫治后舌体形态位置均有改变,舌骨位置后移。

Objective： To compare the position of tongue and hyoid bone of Angle class Ⅲpatients before and after orthodontic treatment. Methods： 26 orthodontic patients with Angle class Ⅲ underwent lateral cephalometric radiography before and after the treatment. The dorsum of tongue was covered with barium sulfate paste. 17 points chosen from tongues and hyoid bones were marked. 13 measured values were analyzed statistically. Results： The change of morphology of tongue（O- T1, T3, T4, T5, T7） had statistical significance（P〈0.05）. Decrease of length and increase of height of tongue,and forward movement of hyoid bone had statistical significance（P 〈 0.05）.Conclusion：After orthodontic treatment of the Angle Ⅲ malocclusion, the morphology of tongue changes and the hyoid bone moved forward.