中国实用口腔科杂志 ›› 2011, Vol. 4 ›› Issue (06): 348-350.

• 论著 • 上一篇    下一篇

前方牵引联合上腭快速扩弓矫治骨性Ⅲ类错牙合30例面部软组织侧貌改变分析

  

  1. 1.大连医科大学附属第一医院口腔正畸科,辽宁  大连  116021;2.同济大学附属口腔医院正畸科,上海  200072
  • 收稿日期:2011-03-06 修回日期:2011-05-12 出版日期:2011-06-15 发布日期:2011-07-11

  • Received:2011-03-06 Revised:2011-05-12 Online:2011-06-15 Published:2011-07-11

摘要:

目的    评价上颌前方牵引联合上腭快速扩弓矫治上颌发育不足所致的骨性Ⅲ类错牙合患者面部软组织侧貌的变化。方法    选择2007年6月至2009年5月大连医科大学附属第一医院口腔正畸科门诊收治的上颌发育不足所致的骨性Ⅲ类错牙合患者30例(均处于生长发育高峰期或高峰前期),均给予快速扩弓联合前方牵引矫治,测量并比较矫治前后面部软组织侧貌变化。结果    前方牵引后,鼻顶点至Y轴距离(Y-Prn)、上唇基角(S-Ns-Sn)、上唇凸距(UL-E) 、上唇凸厚(UL-U1)、上唇凹点至Y轴的距离(Y-As)、上唇突点至Y轴的距离(Y-UL)、颏唇角(LL-Bs-Pos) 、颏厚度(Pos-Po)、软组织下面高(Sn-Mes)、H角均增大(P < 0.01);软组织面角(FH-NsPos)、下唇基角(S-Ns-Bs)、软组织颏前点至Y轴距离(Y-Pos)均减小(P < 0.01),鼻唇角(Cm-Sn-UL)亦减小(P < 0.05)。结论    前方牵引后,上唇显著前移,颏部后下移位,颏唇关系改善,侧貌突度显著增加。

关键词: 上颌前方牵引, 骨性Ⅲ类错牙合, 面部软组织, 上腭快速扩弓

Abstract:

Objective    To study facial soft tissue changes after the treatment  with rapid maxillary expansion (RME) and maxillary protraction appliance in 30 subjects with skeletal Class Ⅲ malocclusion with a retruded maxilla. Methods    Thirty subjects with skeletal Class Ⅲ malocclusions with maxillary retrognathism,admitted to Department of Orthodontics,First Affiliated Hospital of Dalian Medical University from June 2007 to May 2009,were selected and treated by RME and facial mask. Cephalometric measurements about soft tissue changes were analyzed. Results    After face mask therapy,Y-Prn,S-Ns-Sn, UL-E,UL-U1,Y-As (As-point to Y-axis),Y-UL(UL-point to Y-axis), LL-Bs-Pos,Pos-Po,Sn-Mes and H angle increased(P < 0.01); FH-NsPos,S-Ns-Bs and Y-Pos(Pos-point to Y-axis)decreased(P < 0.01),and Cm-Sn-UL also decreased(P < 0.05). Conclusion    After protraction,upper lip area becomes more marked,and chin area moves backward and downward. Class Ⅲ concave profile becomes more balanced and convex.

Key words: maxillary protraction;skeletal Class Ⅲmalocclusion;facial soft tissue;rapid maxillary expansion