面型对正畸治疗中牙根吸收影响的临床研究  

A clinical study of the relationship between different types of malocclusion and root resorption during orthodontic treatment

作　　者：李长霞[1] 李春雷[1] 王大为[1] 张志光[1] 

机构地区：[1]中山医科大学光华口腔医学院正畸科

出　　处：《现代口腔医学杂志》2003年第3期243-245,共3页Journal of Modern Stomatology

摘　　要：目的 评价面型对正畸治疗中出现的牙根吸收的影响。方法 选用120例经方丝弓矫治器固定矫治的青少年,按面型分为高角型、正常型、低角型三个组,每组病人治疗前后分别拍摄全口曲面断层片,配对测量正畸治疗前后牙根等级,将牙根各等级改变的频数量以计算机进行统计分析。结果 三组面型的病例正畸治疗前后牙根等级分布改变有显著的统计学意义(P<0.001)。三组之间组间差异的表现各不相同。高角型病例牙根吸收最轻,而低角型病例易出现重度牙根吸收。三组病例组间差异有显著的统计学意义(P<0.01)。结论 在正畸治疗中不同面型对牙根吸收程度有显著的影响,是影响牙根吸收的一个重要因素。Objective To determine the relation between root resorption and distribution in different facial types. Methods One hundred and twenty Chinese children with fixed orthodontic treatment by Edgewise appliance were divided into three groups according to facial types. Paired pre- treatment and post- treatment measurements were taken for root degrees of all visual root shape. Panoral radiographs were done before and after orthodonctic treatment. Then analyze root resorptive and its distribution changes among groups. Results Root resorption occurred during orthodontic treatment in each group ( P < 0.001). Moreover it seemed that root resorption was lighter in hyperdivergent, while heavier in hypodivergent group during orthodontic treatment. And there were significant differences among three groups(P < 0.01). Conclusion The factor of different facial types was one of the important factors which could influence root resorption during orthodontic treatment.

关 键 词：正畸治疗 牙根吸收 影响 面型 方丝弓矫治器 矫治 

分 类 号：R783.5[医药卫生—口腔医学]