改良扩弓器在矫治安氏Ⅰ类牙列拥挤病例中的临床疗效分析及应用初探

The effects of modified expander in the orthodontic treatment of the cases with Angel Ⅰ malocclusion

目的：评价正畸扩弓矫治安氏Ⅰ类少年病例的临床疗效。方法：纳入14例10~14岁安氏Ⅰ类扩弓非拔牙改良扩弓器矫治病例,对矫治前后的研究模型进行激光三维扫描与测量。通过矫治前后模型的ICON指数和头颅侧位片,对矫治后磨牙建牙合、咬合关系及软组织侧貌等进行评价,用曲面断层片评价矫治后各牙的牙根平行状况。结果：14例患者矫治后牙弓宽度增加（P〈0.05）,其中前磨牙区宽度变化最大,上下颌分别增加（6.94±2.518）mm、（5.99±1.990）mm。ICON疗效分析显示患者矫治后咬合明显改善,牙合关系良好。头颅侧位片提示软组织侧貌协调,面型满意;曲面断层片显示牙根平行状况良好。结论：应用扩弓进行非拔牙矫治,对固定扩弓器整体支抗作用进行利用和细致的临床操作,可获得满意的矫治效果。

Objective： To investigate efficacy of modified expander in the treatment of non-extraction patients with Angel Ⅰ malocculsion. Methods： 14 Angel Ⅰcases aged 10- 14 years treated by non-extraction and fixed rapid expander. Jaw bones of the cases were laser scanned before（ T1） and after treatment（ T2）. The differences of arch width and length between T1 and T2 were analyzed. The Index of treatment complexity,outcome and need（ ICON） was used to assess the pre-treatment and post-treatment study models. Data were statistically analysed with SPSS13. 0 software. Results： The arch width increased significantly from T1 to T2. Good occlusal relationship and soft tissue profiles were achieved in all cases. All cases were evaluated as greatly improved by ICON. Conclusion： AngelⅠ malocclusion can be treated successfully by increasing arch width with fixed rapid expander technique without tooth extraction.