Activator与MBT直丝弓矫治器双期矫治安氏Ⅱ~1类错牙合畸形的临床应用

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英文篇名：The clinical application of Activator and MBT appliance in the two-stage treatment of skeletal Class Ⅱ~1 malocclusion 作者：张衍蓉 ; 陈杰 ; 张大华 ; 刘虎 英文作者：ZHANG Yan-rong;CHEN Jie;ZHANG Da-hua;LIU Hu;Department of Orthodontics,The Affiliated Hospital of Medical College,Qingdao University;Stomatology Hospital of Yanzhou District; 关键词：骨性Ⅱ1类错牙合畸形 ; Activator矫治器 ; 下颌后缩 ; 双期矫治 ; MBT矫治器 英文关键词：skeletal Class Ⅱ 1 malocclusion;;activator appliance;;mandibular retrusion;;two-stage treatment;;MBT appliance 中文刊名：MRYX 英文刊名：Chinese Journal of Aesthetic Medicine 机构：青岛大学医学院附属医院正畸科;济宁市兖州区口腔医院; 出版日期：2015-01-30 出版单位：中国美容医学 年：2015 期：v.24;No.206 语种：中文; 页：MRYX201502019 页数：4 CN：02 ISSN：61-1347/R 分类号：62-65

摘要

目的:探讨Activator矫治器与滑动直丝弓矫治器(MBT appliance)双期矫治安氏Ⅱ1类错牙合畸形的临床效果。方法:选择17例混合牙列期以下颌后缩为主的安氏Ⅱ1类错牙合患者,Ⅰ期采用Activator矫治器,Ⅱ期采用MBT直丝弓矫治器。每位患者均拍摄矫治前、后头颅定位侧位片、曲面断层片,以X线头影测量方法评价疗效。结果:硬组织主要测量项目的变化:SNB角增加2.9°,ANB角减小2.9°,下中切牙切缘至鼻根点与下齿槽座点连线的垂直距离L1-NB(mm)减小3.5°,下颌体长度Go-Gn(mm)增加3.0mm,前面高N-Me(mm)增加5.6mm;软组织主要测量项目的变化:鼻唇角Cm-Sn-UL增大7.2°,颏唇沟角Li B'Pg'增大12.1°,面凸角Ns-Sn-Pos减小2.0°,上唇-审美平面Ls-E(mm)减小1.6mm,下唇-审美平面Li-E(mm)增大2.1mm。治疗结束时磨牙和尖牙均为安氏Ⅰ类关系,前牙覆盖明显减小,侧面型有所改善。结论:安氏Ⅱ1类错牙合患者在替牙期采用双期矫治能改善其面部侧貌,显著改善上下颌骨骨性关系。Activator能有效促进下颌生长。
        Objective To investigate the clinical application effects of Activator and MBT appliance in the two-stage treatment of skeletal Class Ⅱ1 malocclusion. Methods 17 Class II division 1 patients with mandibular retrusion in mixed or early permanent dentition were chosen(Activator in the first phase,MBT appliance in the second phase.)Before and after the treatment all the patients were taken panoramic and cephalometric. Results The changes of cephalometric measurement of hard tissue:SNB increased 2.9°,ANB reduced 2.9°,L1-NB reduced 3.5 °,Go-Gn increased 3.0mm and N-Me went up 5.6mm;The changes of cephalometric measurement of soft tissue:Cm-Sn-UL increased7.2°,Li B'Pg' increased 12.1 °,Ns-Sn-Pos had 2.0°reduction,Ls-E went down 1.6mm and Li-E had2.1mm increasion.Class I molar and canine relationships were achieved after the treatment.The overjet was significantly decreased,and the profile was remarkably improved. Conclusion Two-stage treatment was effective on the improvement of facial profile in mixed or early permanent dentition in Class II division 1 patients.The skeletal jaw relationship can be distinctly improved. Activator can promote the mandible growth.

引文

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