摘要
目的：评价片段弓、高位J钩在矫治重度深覆[牙合]过程中对根尖吸收的影响。方法：随机选择41例经过标准方丝弓技术治疗的成人女性高角的重度深覆[牙合]患者（覆[牙合]〉II°），其中25例在咬合打开阶段应用高位J钩配合治疗，16例用片段引配合治疗，并在根尖定位片上对咬合打开前后的根尖吸收情况进行观察，分别测量两组治疗前后上颌4个上切牙的牙根吸收等级，用Ridit检验分析各组治疗前后根尖吸收等级，用矿检验分析两组治疗后的吸收情况。结果：两组正畸治疗后均可见牙根吸收，治疗前后的牙根吸收等级比较，片段弓组无显著性差异（P〉0．05），高位J钩组有显著性差异（P〈0．01）。治疗后两组间牙根吸收等级比较，差异呈显著性（P〈0．01），标准方丝弓配合高位J钩组还出现了极重度吸收。结论：标准方丝弓配合高位J钩在正畸治疗中较单纯使用标准方丝弓技术更易产生严重的牙根吸收。标准方丝弓配合片段弓矫治深覆[牙合]时，在合适的力、力点及力作用时间内，对根吸收的影响是较小的；标准方丝弓配合高位J钩在正畸治疗中较易产生严重的牙根吸收。
Objective To investigate the effection of segmented arch technique and high pull J hook headgear on Periapical resorption of maxillary incisors during deep overbite correction. Methods A total of forty one female adolescent subjects who have II - III degree deepbite were selected,they all had finished orthodontic treatment.Sixteen cases had an addition segmented arch to assist overbite opening,twenty five cases had an addition HPPJ to assist overbite opening,the two groups were matched with age and type of malocclusion.Periapical resorption was observed on periapical radiography. Ridit test was used to evaluate the degree of the periapical resorption of each group before and after the orthodontic treatment,x2 test was used for the different between the two groups after orthodontic treatment. Results The incidence of root resorption on upper incisors was found after orthodontic treatment in the two groups,but the change of the segmented arch group had no statistical significance,the HPPJ group had a statistical significance, changes betweenthe two group also had statistical significance. Conclusion During segmented arch technique correcting deep overbite,minor effection to Periapical resorption was observed,by using appropriate size,location and duration of power,but a combination of HPPJ might lead to more severe root resorption during orthodontic treatment.
出处
《中国美容医学》
CAS
2012年第8期1370-1373,共4页
Chinese Journal of Aesthetic Medicine
关键词
片段弓
高位J钩
深覆[牙合]
根尖吸收
segmented arch technique
HPPJ
deep overbite
periapical resorption
