正畸治疗中牙根吸收的原因分析

Analysis the Factors Related to Root Resorption During Orthodontic Treatment

目的:探讨患者的年龄、性别在正畸治疗中对牙根吸收的影响。方法:选用128例经直丝弓矫治器矫治完成的病例,患者治疗前后分别拍摄全口曲面断层片,测量不同年龄、性别组治疗前后上、下颌前牙的牙根长度变化。结果:成人组与儿童组上颌前牙正畸治疗前后牙根吸收差别无统计学意义,而下颌前牙正畸治疗前后牙根吸收差别有统计学意义(P<0.05);不同性别组上、下颌前牙正畸治疗前后牙根吸收差别无统计学意义。结论:年龄是正畸治疗中影响牙根吸收的一个重要因素。

Objective：To evaluate the influence of age and gender on the root resorption during orthodontic treatment. Methods：In this study,128 cases treated with straight-wire appliances were selected. Panoramic radiographs were studied before and after treatments. These cases were grouped with age and gender. The variations of root length before and after treatments were measured in different groups. Results：There＇s no significant statistical difference on the variations of root resorption before and after treatments for the maxillary anterior teeth between the adults group and the children group,while there＇s significant statistical difference on the same value for the mandibular anterior teeth between these groups（P〈0.05）. There＇s no significant statistical difference on the variations of root resorption before and after treatments between different gender groups for both maxillary and mandibular anterior teeth. Conclusion：Age is an important factor affecting root resorption.