内收及压低上前牙致牙根吸收的临床观察  

Clinical observation of root resorption caused by retraction and intrusion of the anterior teeth

作　　者：魏艳华[1] 张端强[1] 

机构地区：[1]福建医科大学附属口腔医院正畸科,350002

出　　处：《中国实用医药》2014年第28期24-26,共3页China Practical Medicine

摘　　要：目的研究在正畸治疗中内收及压低上颌前牙时牙根吸收的情况。方法 40例上颌前突的AngleⅠ类或AngleⅡ类1分类错牙合畸形的病例,其中20例采用单纯直丝弓治疗(直丝弓组),另外20例在内收前牙阶段配合应用高位J钩压低上前牙(直丝弓配合高位J钩组)。矫治前后拍摄全颌曲面断层片,分别测量两组治疗前后的上前牙牙根吸收等级。结果两组病例矫治后均有牙根吸收,两组治疗后牙根吸收等级差异有统计学意义(P<0.01);每组治疗前后的牙根吸收等级比较,差异有统计学意义(P<0.01)。结论在正畸治疗内收上前牙中配合高位J钩较易引起前牙的牙根吸收。Objective To investigate the root resorption during orthodontic treatment with retracting and intruding the anterior teeth. Methods There were 40 cases of Angle Class Ⅰor Angle Class Ⅱcrossbite of maxillary protrusion. Among them, 20 cases were treated by straight wire along （straight wire group）, and the other 20 cases were treated by additional high pull J hook headgear （HPHG） to assist anterior teeth retraction. Panoramic radiographs were taken before and after the orthodontic treatment, and were used to evaluate the degree of root resorption of upper anterior teeth. Results Root resorption occurred in both groups, and the difference of the degree of root resorption between the two groups had statistical significance （P〈0.01）. There were differences of the degree of root resorption in each group before and after the treatment （P〈0.01）. Conclusion The combination of HPHG and straight wire in orthodontic treatment can lead to easy root resorption of anterior teeth.

关 键 词：牙根吸收 全颌曲面断层片 高位J钩 

分 类 号：R783.5[医药卫生—口腔医学]