头影测量分析2种方法矫治乳牙反牙合后上颌恒切牙胚位移的比较  

Two appliances for anterior crossbite correction in deciduous dentition:a comparison of permanent incisor germ displacement based on cephalometric measurement

作　　者：刘亚非[1] 左艳萍[1] 刘昕[2] 赵利霞[1] 尉静[1] Liu Yafei;Zuo Yanping;Liu Xin;Zhao Lixia;Wei Jing(Department of Orthodontics,the First Hospital of Hebei Medical University,Shijiazhuang 050031,Hebei Province,China;Department of Stomatology,the Fourth Hospital of Hebei Medical University,Shijiazhuang 050017,Hebei Province,China)

机构地区：[1]河北医科大学第一医院口腔正畸科,河北省石家庄市050031 [2]河北医科大学第四医院口腔科,河北省石家庄市050017

出　　处：《中国组织工程研究》2021年第29期4593-4599,共7页Chinese Journal of Tissue Engineering Research

基　　金：河北省卫生厅科研基金项目(20100050),项目负责人:刘亚非。

摘　　要：背景:目前对于乳牙反[牙合]矫治后恒切牙牙胚的影响机制尚不明确。目的:观察分析改良[牙合]垫矫治器和前牵引固定矫治器矫治乳牙反[牙合]后,上颌恒切牙牙胚位置及角度的改变。方法:选取2008至2018年收治的乳牙反[牙合]患者36例,根据矫治方法不同分为:[牙合]垫组,使用改良[牙合]垫矫治器矫治;前牵组,使用前牵引固定矫治器矫治乳牙反[牙合]。测量分析矫治前后上颌恒牙胚位置和角度的改变。该研究方案的实施符合河北医科大学第一医院的相关伦理要求,患儿监护人对试验过程完全知情同意。结果与结论:①治疗前头影测量患者恒切牙胚的倾斜度G1-SN、G1-NA,[牙合]垫组均小于前牵组(均P <0.05);②2组治疗后恒切牙胚切缘及根尖在X轴距,Y轴距均较治疗前均有明显增加(P <0.05或P <0.01),前牵组各指标的增长量显著大于[牙合]垫组(P <0.05或P <0.01或P <0.001);③结果说明,改良[牙合]垫矫治器和前牵引固定矫治器矫治乳牙反[牙合]后,上颌恒切牙胚均发生向前向下移动,前牵组的位移更为显著。前牵引矫治较[牙合]垫矫治器矫治对恒牙胚的影响更大,更能促进恒切牙胚的前下方移动,同时其上颌恒牙胚的位移方式更接近整体移动。BACKGROUND:Currently,it is still unclear on the mechanism by which anterior crossbite correction in deciduous dentition exerts a role in permanent incisor germ.OBJECTIVE:To compare and analyze the changes in the position and angle of the maxillary permanent incisor germ after the modified block appliance and the protraction appliance are used to correct anterior crossbite in the deciduous dentition.METHODS:Thirty-six patients with deciduous anterior crossbite admitted from 2008 to 2018 were treated with modified block appliance or protraction appliance.The positions and angles of maxillary permanent incisor germs before and after orthodontic treatment were measured and analyzed.The implementation of the study protocol complied with the relevant ethical requirements of the First Hospital of Hebei Medical University,and guardians of these included children were fully informed of the trial process.RESULTS AND CONCLUSION:Preoperatively,the inclination of the maxillary permanent incisor germs G1-SN and G1-NA were smaller in the modified block appliance group than in the protraction appliance group(both P<0.05)The axial distance of the incisal edge and root tip of maxillary permanent incisor germs in X-axis and Y-axis was increased obviously in the two groups(P<0.05 or P<0.01),especially in the protraction appliance group(P<0.05 or P<0.01 or P<0.001).These findings indicate that both modified block appliance and protraction appliance can make maxillary permanent incisor germs move forward and downward,and the displacement is more evident after orthodontic treatment with protraction appliance.Compared with the modified block appliance,the protraction appliance has a more obvious effect on the forward and downward movement of maxillary permanent incisor germs,and this movement mode is similar to the whole movement.

关 键 词：乳牙反牙合 恒切牙胚 改良牙合垫矫治器 前牵引固定矫治器 Ⅲ类错牙合 

分 类 号：R459.9[医药卫生—治疗学] R496[医药卫生—临床医学]