安氏Ⅱ~1类错畸形不同垂直骨面型磨牙倾斜度的研究

The research on the molar inclination in Class Ⅱ division 1 malocclusion different vertical facial types

目的探究安氏Ⅱ~1类错畸形不同垂直骨面型磨牙倾斜度的区别及相互关系。方法选取安氏Ⅱ类成人患者120例,其中骨性Ⅰ类60例,为对照组;骨性Ⅱ类60例,为实验组。通过头颅侧位片对样本进行上下磨牙倾斜度的测量和分析。结果骨性Ⅰ类上颌磨牙相对于前颅底平面、腭平面倾斜度高角组大于低角组,下颌磨牙相对于前颅底平面、下颌平面倾斜度高角组大于低角组;骨性Ⅱ类下磨牙相对于前颅底平面、下颌平面、腭平面倾斜度高角组大于低角组;骨性Ⅱ类高角组、均角组下磨牙相对于前颅底平面、腭平面均大于骨性Ⅰ类。结论骨性Ⅰ类中高角组较低角组上颌磨牙更向远中倾斜,下磨牙更向近中倾斜;骨性Ⅱ类高角组较低角组下磨牙更向近中倾斜;骨性Ⅱ类高角组、均角组相对于骨性Ⅰ类高角组、均角组下磨牙明显向近中倾斜。

Objective To explore the differences in class II Division 1 malocclusion of different vertical facial molar inclination and the relationship between them. Methods 120 cases of class ][I adult patients, including 60 cases of skeletal class I, as the control group; 60 cases of skeletal Class II, as the experimental group. Measurement and analysis of the upper and lower molar inclination of the sample by the lateral radiographs. Results The skeletal class I upper molar inclination relative to the anterior skull base plane, palatal plane of high angle group is larger than in the low angle group, the lower molar inclination relative to the anterior skull base plane, mandibular plane of high angle group larger than in the low angle group; skeletal Class II lower molar inclination relative to the anterior cranial base plane and mandibular plane, palatal plane of the high angle group is greater than low angle group; skeletal class ]/lower molar inclination in high angle group, average angle group relative to the anterior skull base plane and palatal plane is greater than the skeletal class I. Conclusion Skeletal class I high angle group maxillary molars tilt is more distal than low angle group, and the lower molar inclination is more proximal; skeletal Class II lower molar inclination in high angle group is more proximal than low angle group; skeletal class II high angle group, average angle group compared with skeletal class I high angle group, the average angle group lower molar is more mesial tilt significantly.