中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (17): 3217-3221.doi: 10.3969/j.issn.1673-8225.2010.17.045

• 骨与关节实验造模 experimental modeling of the bone and joint • 上一篇    下一篇

应用Twin-block矫治器后Ⅱ类错牙合 患者面型突度软硬组织的改变

刘亚非1，崔丽娟2，左艳萍1，刘学聪3，刘  昕4   

  1. 1河北医科大学第一医院正畸科， 河北省石家庄市  050031；河北医科大学，2基础医学院，4临床医学院，河北省石家庄市  050031；3河北省儿童医院，河北省石家庄市  050031
  • 出版日期:2010-04-23 发布日期:2010-04-23
  • 通讯作者: 左艳萍，博士，教授，主任医师，河北医科大学第一医院正畸科，河北省石家庄市 050031
  • 作者简介:刘亚非★，女，1975年生，河北省石家庄市人，汉族，2008年河北医科大学毕业，硕士，主治医师，主要从事正畸方面的研究。

Face convexity changes in class II malocclusion patients after Twin-block appliance therapy

Liu Ya-fei1, Cui Li-juan2, Zuo Yan-ping1, Liu Xue-cong3, Liu Xin4   

  1. 1 Department of Orthodontics, First Hospital of Hebei Medical University, Shijiazhuang   050031, Hebei Province, China; 2 School of Basic Medical Science, Hebei Medical University, Shijiazhuang   050031, Hebei Province, China;    3 Children’s Hospital of Hebei Province, Shijiazhuang   050031, Hebei Province, China; 4 Clinical Medical College of Hebei Medical University, Shijiazhuang   050031, Hebei Province, China
  • Online:2010-04-23 Published:2010-04-23
  • Contact: Zuo Yan-ping, Doctor, Professor, Chief physician, Department of Orthodontics, First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China zyp6381@sina.com
  • About author:Liu Ya-fei★, Master, Attending physician, Department of Orthodontics, First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China yafei_lyf@sina.com

PDF

545

被引次数

10

摘要：

背景：国内外研究证实Twin-block矫治器不仅能有效地改变硬组织，还能有效地改变软组织侧貌，那么在软硬组织的改变间是否存在一定的关系和规律呢？
目的：评价分析Twin-block功能矫治前后面型突度软硬组织的改变，并与自然生长组面型突度的改变进行对比。
方法：选择Hagg手腕骨片为FG-G期的安氏Ⅱ类1分类下颌后缩患者31例，其中以接受Twin-block功能矫治的Ⅱ类错牙合患者17例作为实验组，以放弃正畸治疗的Ⅱ类错牙合患者14例为对照组，分别在治疗前后拍摄头颅侧位片。比较Twin-block功能矫治前后和自然生长前后侧位片面型突度软硬组织的改变。应用无常量的-元线性回归方程，分析软硬组织改变量的线性关系，并对Twin-block组和自然生长组的数学回归方程进行对比分析。
结果与结论：发现在Twin-block治疗前后，上下齿槽座相对于鼻、颏位置的改变与上下唇凹点相对于鼻、颏位置的改变具有显著相关性，即A-E改变量与Ss-E改变量、B-E改变量与Si-E改变量，具有线性相关性，其中Si–E改变量与B-E改变量相关系数Pearson=0.839最大，说明二者的相关程度最好。对照组2对标志点无线性关系。通过统计分析得到Twin-block治疗前后面型突度软硬组织改变量关系的线性方程：Si-E= 0.745 B-E，Ss-E = 0.276 A-E。线性方程不仅有助于解释Twin-block矫治促进下颌骨生长的同时，安氏II类1分类下颌后缩患者的面型突度也随之发生明显的临床观察结果，而且有助于预测Twin-block矫治器面型突度的改变。  

关键词: Ⅱ类错牙合, Twin-block矫治器, 软硬组织改变, 线性关系, 数字化医学

Abstract:

BACKGROUND: Twin-block appliance has been confirmed to efficiently change hard tissue and the profile of soft tissue. Whether a linear relationship exists between soft tissue and hard tissue changes remains unclear.
OBJECTIVE: To evaluate the face convexity changes of soft and hard tissues after Twin-block appliance therapy and compare with controls. 
METHODS: Thirty-one class II division 1 malocclusion subjects with hand-wrist radiographs in FG-G stage were selected. Among the 31 patients, 17 received Twin-block appliance therapy, serving as experimental group, and the remaining 14 subjects abandoned treatment, serving as control group. Cephalometric radiographs of each included subject were taken prior to and after treatment or observation. Face convexity of soft and hard tissues, as well as the face convexity changes, was compared between the experimental and control groups. Linear regression equation was employed to analyze the linear association between soft- and hard-tissue changes. Regression equations of experimental and control groups were compared.
RESULTS AND CONCLUSION: Prior to and after Twin-block appliance therapy, a significant correlation existed between the position changes of superior and inferior alveolar sockets relative to the nose and mandible, and the position changes of upper and lower lip pits relative to the nose and mandible, i.e., there was a linear correlation between A-E change and Ss-E change, and between B-E change and Si-E change. The largest Pearson's correlation coefficient (0.839) appeared between Si-E change and B-E change, indicating the best correlativity between these two changes. Statistical analysis revealed that the linear equations of face convexity changes of soft and hard tissues after Twin-block appliance therapy were Si-E = 0.745 B-E, Ss-E = 0.276 A-E. These linear equations would be helpful to explain mandible growth and face convexity change after Twin-block appliance therapy and predict the prognosis of face convexity change.
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