改良Twin-Block矫治器对骨性安氏Ⅱ类1分类错[牙合]畸形患儿侧貌及PAR指数的影响  

Effects of modified Twin-Block appliance on profile and PAR index of children with skeletal class Ⅱ division 1 malocclusion

作　　者：陈馨 沈小波[1] 彭佳美 冯兴梅[1] CHEN Xin;SHEN Xiao-bo;PENG Jia-mei;FENG Xing-mei(Department of Orthodontics,the Affiliated Hospital of Nantong University,Nantong,Jiangsu 226001,China)

机构地区：[1]南通大学附属医院口腔正畸科,226001

出　　处：《天津医药》2020年第3期199-203,共5页Tianjin Medical Journal

摘　　要：目的观察改良Twin-Block矫治器对骨性安氏Ⅱ类1分类错[牙合]畸形患儿侧貌及正畸标准指数(PAR)的影响。方法回顾性分析2016年12月2019年5月于我院口腔科进行诊治的42例骨性安氏Ⅱ类1分类错[牙合]畸形患儿的病例资料,并依据治疗措施的不同分为观察组和对照组,各21例。观察组患儿Ⅰ期均采用改良Twin-Block矫治器进行矫正治疗6个月,对照组患儿给予传统Twin-Block矫治器进行矫正治疗6个月,2组Ⅱ期均给予标准方丝弓矫治器矫正。比较治疗前和Ⅰ期治疗后2组患儿颏部软组织侧貌形态和PAR指数变化。结果治疗6个月后,与对照组相比,观察组患儿下唇基角、颊唇沟角增大,下唇凸点-H线距离缩小(P<0.05);同时观察组患儿前牙排列、后牙排列、颊侧咬合、覆盖、覆[牙合]、中线以及PAR总分等指标均明显减小(P<0.01)。结论对骨性安氏Ⅱ类1分类错[牙合]畸形患儿采用改良Twin-Block矫治器有助于改善其软组织侧貌形态和PAR指数,效果确切,值得临床推广应用。Objective To observe the effect of modified Twin-Block appliance on the profile and PAR index of children with classⅡdivision 1 malocclusion.Methods Data of 42 children with skeletal classⅡdivision 1 malocclusion in the Department of Stomatology of our hospital from December 2016 to May 2019 were retrospectively analyzed.The patients were divided into observation group and control group,with 21 cases in each group.The patients in the observation group were treated with modified Twin-Block appliances during the stageⅠ,and the control group was treated with the traditional Twin-Block appliances for six months.During the stageⅡ,both groups were treated with the standard edgewise archwire appliances.The X-ray cephalometric measurements were used to analyze the profile of the children.The changes of PAR index before and after treatment were compared between the two groups.Results After 6-month treatment,compared with the control group,the base angle of the lower lip and the angle of buccal and labial groove increased in the observation group,and the distance between the convex point of the lower lip and the H-line decreased(P<0.05);at the same time,the anterior teeth arrangement,posterior teeth arrangement,buccal occlusion,coverage,overbite(occlusion),midline and par total score significantly decreased in the observation group compared with those of control group(P<0.01).Conclusion The modified Twin-Block appliance is helpful to improve the profiles and postoperative PAR indices of children with classⅡdivision 1 malocclusion,and it is worthy of clinical application.

关 键 词：改良Twin-Block矫治器 骨性安氏Ⅱ类1分类错[牙合]畸形 PAR指数 疗效评价 口腔正畸学 

分 类 号：R783.5[医药卫生—口腔医学]