青少年病例正畸治疗前后下颌平面旋转的纵向研究  

Longitudinal Study on the Rotations of Mandible during and after Orthodontics Treatment

作　　者：王剑锋[1] 林新平[2] 魏利敏[1] 倪振宇[1] 

机构地区：[1]温州医学院附属口腔医院正畸科,浙江温州325027 [2]浙江大学附属口腔医院正畸科

出　　处：《口腔医学研究》2008年第1期67-69,共3页Journal of Oral Science Research

基　　金：浙江省卫生科技计划项目(编号:2004B161)

摘　　要：目的:探讨下颌平面在正畸矫治前后及保持阶段的变化。方法:本研究资料选自2001～2005年间在温州医学院附属口腔医院正畸科就诊的门诊病例,其中安氏Ⅰ类14例,女11例,男3例;安氏Ⅱ类10例,女8例,男2例;年龄分布在12～13岁,平均年龄12岁零3个月,平均疗程1年零8个月,平均保持时间1年零6个月。分别在矫治前(T1),矫治结束时(T2)、保持1年以后(T3)3个阶段拍摄X线头颅侧位片,利用winceph7软件进行头影测量。结果:治疗期间下颌平面呈现顺时针旋转,<Y-SN增加了0.73°,有显著性意义。保持期间<Y-SN减少了0.26°,但没有统计学意义。结论:正畸治疗对青少年病例下颌骨生长存在一定影响,造成下颌骨顺时针旋转,并且在保持结束时没有恢复至原有水平。Objective： To investigate the rotations of mandible during and after orthodontics treatment. Methods： 24 cases were selected from the orthodontics database of Department of Orthodontics, School ＆ Hospital of Stomatology, Wenzhou Medical College. The sample consisted of 14 angle Ⅰ cases（ 11 females,3 males）and 10 angle Ⅱ cases（8 females,2males）. Deviation of age was from 12 to 13 and mean age was 12 years and 3 months. Mean treatment time was 1 years and 6 months. Cephalometric radiographs was taken before the treatment（ T1 ）, in the end of the treatment（T2） and one year maintenance after the treatment （ T3 ）. Typical marks of hard tissue were selected and measured in Winceph7.0 software. Results：During treatment, the mean increase of 〈 Y - SN was 0.73° with statistical significance. After retention, this angle was reduced on average by only 0.26°without statistical significance. Conclusion： Orthodontics treatment do influence the development of mandible and result in opening rotations of the mandible, which can not return to the pretreatment value after retention.

关 键 词：下颌平面 正畸治疗 头影测量 

分 类 号：R783[医药卫生—口腔医学]