自锁托槽和传统托槽与切牙牙根外吸收的临床对比研究  

A clinical study of external apical root resorption of maxillary incisors in patients treated with conventional or self-ligating brackets

作　　者：杨一可 朱正宏[1,2] 

机构地区：[1]南京同仁医院口腔科,江苏南京211102 [2]首都医科大学附属北京同仁医院口腔科,北京100730

出　　处：《现代医学》2012年第2期192-196,共5页Modern Medical Journal

摘　　要：目的:评价运用自锁托槽和传统托槽在正畸治疗中对牙根外吸收的影响。方法:选取南京同仁医院口腔科32例非减数治疗安氏Ⅰ类均角错畸形患者,分为自锁托槽组和传统托槽组,两组患者治疗前后分别拍摄全颌曲面断层片,牙根形态按等级分级,统计分析治疗后各等级频数分布以及根吸收增加量变化。结果:两组病例在治疗后牙根吸收等级分布频数均增大,自锁组上颌切牙牙根吸收增加量略大于传统组,但差异无统计学意义。结论:自锁托槽与传统托槽均可造成切牙根吸收,自锁托槽对非减数安氏Ⅰ类错颌畸形治疗过程中牙根吸收的影响与传统托槽相比有增加趋势,但差异无统计学意义。Objective： To comparatively investigate the amount of external apical root resorption（EARR） of maxillary incisors between conventional and passive self-ligating brackets.Methods： Thirty-two patients were selected from a pool of patients satisfying the following inclusion criteria： class Ⅰ Malocclusion without extraction,normal mandbular plane angle.Patients received treatment with either a passive self-ligating bracket system or a conventional edgewise appliance,both with a 0.022-in slot.EARR of the maxillary incisors was evaluated on panoramic radiographs,taken before and after orthodontic treatment measured by Levander Malmgren system.The result of EARR in different treatment groups was analysed with SPSS 17.0.Results： Straight wire treatment could cause apical root resorption of incisor.Overall,no difference was found in the amount of EARR between appliance systems.Conclusion： No difference should be expected for root resorption between conventional and passive self-ligating brackets.

关 键 词：牙根外吸收 自锁托槽 传统托槽 正畸治疗 

分 类 号：R783.5[医药卫生—口腔医学]