成人对不同垂直骨面型尖牙远中移动牙根吸收的影响

Adults with Different Vertical Bone Surface Fangs Far in Root Absorption Effect

目的分析成人拔牙矫治先后曲面断层片尖牙冠根比的变化,研究不同垂直骨面型对尖牙的影响。方法收集符合要求的患者101例接受O-PAK固定直丝弓矫治,按下颌平面角分为高角型,低角型,均角型。结果组间比较,均为实验一组与对照组差异有统计学意义(P<0.05);实验二组与对照组相比较,差异无统计学意义(P>0.05);三组组内比较,差异有统计学意义(P<0.05),经两两比较,差异有统计学意义(P<0.05),即低角型>均角型>高角型。低角型吸收最多,高角型吸收最少。结论正畸治疗中不同垂直骨面型对尖牙牙根吸收有影响;移动距离对牙根吸收有影响。

Objective To analyze the change of the tooth crown root ratio before and after the treatment of adult tooth extraction, and to investigate the influence of different type vertical bone surface of teeth. Methods According to a requirement to collect 100 patients with fixed straight O - PAK silk bow treatments, the experimental group was divided into high Angle, low Angle and Angle of both type three categories, according to the mandibular plane Angle. Results Two experiment groups showed a statistically significant compared with the control group; the Experiment 2 was not statistically significant compared with control group. After comparing the two, three groups all had differences, which was the low Angle 〉 all Angle 〉 high Angle. Conclusion In the orthodontic treatment, different vertical bone surface affects pointed fang root absorption and also affects root absorption moving distance.