摘要
【目的】比较前牵引(FM)与前牵引联合上颌快速扩弓(RME)对青少年Ⅲ类错[牙合]患者牙颌矫治效果的影响。【方法】35例上颌发育不足的青少年Ⅲ类错[牙合]患者分别进行单纯前牵引(FM组,13例)及前牵引联合上颌快速扩弓(FM+RME组,22例)矫治。通过测量矫治前后头颅定位侧位片8个角度和8条线距,比较两种矫治方法对牙颌矫治的疗效。【结果】两组矫治前各个角度和线距测量值比较无统计学差异(P〉0.05);FM组矫治后PP—SN角、Co—Gn距和Go—Me距与矫治前比较无统计学差异(P〉0.05),其余各角度和线距矫治前后的比较均有统计学差异(P〈0.05)。FM+RME组矫治前后PP—SN角、U1-SN角、Co—Gn距和Go—Me距比较无统计学差异(P〉0.05);其余各角和线距测量值矫治前后的比较均有统计学差异(P〈0.05)。组间比较:FM组上前牙(U1-SN角)发生了更多的唇倾,而FM+RME组上颌骨更多的发生了前移(Wits值),其余各值在两组间无统计学差异(P〉0.05)。【结论】FM可使上颌骨前移,下颌骨产生顺时针旋转,而FM+RME疗效更明显。
[Objective] To compare the skeletal and dental outcomes of face mask (FM)with and without rapid maxillary expansion (RME) in adolescents with maxillary retrognathia. [Methods] There were 16 males and 19 females with an age range of 8-13 years. Pretreatment and posttreatment cephalometric radiographs were analyzed for skeletal class III malocclusion. They were divided into two groups of FM alone ( n=13) and FM plus RME ( n =22). Eight cephalometric linear and eight angular variables were measured to assess the skeletal and dental changes. Within-group and between-group comparisons were determined by paired t-test. [Results] For-ward displacement of maxilla and clockwise rotation of mandible occurred in two groups. The maxillary-mandibular relationship existed. Most indices presented statistical significance within group. However, only U1- SN and Wits were different between groups. [Conclusion] Forward movement of maxilla and clockwise rotation of mandible may be obtained in adolescents after face masking. Yet RME can further improve the treatment outcomes.
出处
《医学临床研究》
CAS
2015年第7期1287-1289,共3页
Journal of Clinical Research