异常牙根形态对正畸治疗前后前牙根吸收的影响  

Effects of abnormal anterior root shapes on root resorption in orthodontic patients

作　　者：徐科峰[1] 

机构地区：[1]南京中医药大学昆山附属医院口腔科,昆山215300

出　　处：《口腔医学》2011年第11期689-691,共3页Stomatology

摘　　要：目的调查异常牙根形态在正畸治疗前后对牙根吸收的影响。方法随机选择经直丝弓矫治技术完成的病例153例,分析患者治疗前后的全口曲面断层片,将前牙按根形态分为正常组、短根组、钝根组、弯根尖组及滴管状根组5组,以Levander和Malmgren的牙根吸收分级法记录每个前牙牙根根吸收程度,将牙根根吸收程度及其改变的频数进行统计分析。结果前牙中异常根形态的发生率为16.92%,以弯根尖与钝根最为常见;根形态异常组与正常组的根吸收均值间在正畸治疗前有显著性差异(P<0.05),正畸治疗后亦有显著性差异(P<0.01),其中短根组根吸收值最高,其次为滴管状根组;根形态异常组在正畸治疗前后的根吸收发生率均较正常组高,差异有显著性(P<0.01)。结论异常牙根形态能显著增加牙根吸收的发生率和严重程度。Objective To investigate effects of abnormal anterior root shapes on root resorption in orthodontic patients.Methods 153 cases treated with straight wire appliance were randomly selected.Pretreatment and posttreatment panoramic radiographs of those patients were examined to assess changes in root length and apical contour according to criteria modified from Levander and Malmgren.Changes of the prevalence and severity of root resorption were analyzed.Results The prevalence of abnormal root shapes was 16.92%.The most common abnormal root shapes were apical bends and blunt.There were statistically significant differences in the mean of root resorption between abnormal group and the normal group before treatment（P0.05）.And there were more statistically significant differences after treatment（P0.01）,especially in the short root group and pipette shape root group.The prevalence of root resorption in abnormal group was statistically significantly higher than in that normal group,before and after treatment（P0.01）.Conclusions Abnormal root shapes can significantly improve root resorption and its severity.

关 键 词：牙根形态 牙根吸收 正畸 

分 类 号：R783.5[医药卫生—口腔医学]