改良Nance弓矫治上颌埋伏尖牙对牙周硬组织及牙根的影响  

Study of the crestal bone height and root length technique change of impacted canines treated by modified Nance arch technique

作　　者：伊松[1] 胡荣党[1] 倪振宇[1] 郑敏玲[1] 吕琦[1] 

机构地区：[1]温州医学院附属口腔医院口腔正畸科,浙江温州325027

出　　处：《上海口腔医学》2009年第4期342-345,共4页Shanghai Journal of Stomatology

基　　金：温州市科技局资助项目(Y2005B008)~~

摘　　要：目的:探讨改良Nance弓结合直丝弓矫治上颌埋伏尖牙对牙周硬组织及牙根的影响。方法:利用改良Nance弓矫治8例单侧尖牙埋伏阻生,以对侧自然萌出尖牙作为自身对照。治疗前、后拍摄全景片,测量患侧尖牙移动的距离和角度改变,治疗侧和对侧侧切牙、尖牙、相邻前磨牙的牙槽嵴顶至釉牙骨质界距离及牙根长度,采用SPSS11.0软件包对数据进行配对t检验。结果:埋伏尖牙平均移动距离为18.43mm,全景片上平均移动角度为32.7°,埋伏尖牙侧相邻侧切牙和前磨牙的牙槽嵴高度无降低,牙根无吸收(P>0.05)。结论:改良Nance弓结合直丝弓技术是矫治上颌埋伏尖牙的安全、有效方法。PURPOSE：The purpose of this study was to evaluate the crestal bone height and root length change after orthodontic treatment of impacted canines with modified Nance arch technique.METHODS：8 maxillary impacted canines were treated with modified Nance arch technique.The canines of other side which were naturally erupted were used for self-control.Pre-treatment and post-treatment panoramic radiographs were measured and the following data was collected：（1）The distance of the impacted canine migration and the angle change of the impacted canine;（2）Crestal bone height and root length between previously impacted canines and adjacent lateral incisors and premolars（experimental）and contralateral control teeth.The crestal bone height and root length were compared using a paired t test with SPSS11.0 software package.RESULTS：The mean distance of the impacted canine migration was 18.43mm and the mean angle change on the panoramic radiograph was 32.7°.No difference was found in the crestal bone height and the root length between the adjacent lateral incisors and premolars（experimental） and the contralateral control teeth（P〉0.05）.CONCLUSION：The combination of modified Nance arch with straight wire arch technique is a valid method to treat maxillary impacted canines.

关 键 词：改良NANCE弓 埋伏牙 尖牙 正畸治疗 

分 类 号：R783.5[医药卫生—口腔医学]