Empower双核矫治器拔牙矫治的牙齿移动分析

The analysis of tooth movement in the orthodontic treatment by Empower appliance following tooth extraction

目的:探讨Empower双核矫治器与Damon3-Mx矫治器拔牙矫治过程中牙齿移动的特点。方法:选择40例双牙弓前突患者,平均分为2组(n=20),拔除4个第一前磨牙后,一组采用Empower矫治器,另一组采用Damon3-Mx矫治器,均不采用支抗增强措施,治疗前后拍摄X线头颅定位侧位片,定点、测量19项测量项目,对测量结果进行2组独立样本t检验。结果:2组X线头影测量:牙性指标∠UI-SN、∠UI-PP、∠L1-MP、∠U1-L1、UIE-PTV、LIE-PTV治疗前后组内、2组间及2组变化量间差异有统计学意义(P<0.05)。UM-PTV、LM-PTV、UIA-PTV、LIA-PTV、UL-EP、LL-EP、Z角治疗前后组内差异有统计学意义(P<0.05),治疗后2组间差异无统计学意义(P>0.05)。结论:应用Empower双核矫治器治疗双牙弓前突的患者,可以得到较好的支抗控制及前牙转矩控制,上下前牙内收明显,软组织侧貌改善明显。

Objective：To study the tooth movement in the orthodontic treatment by Empower appliance following tooth extraction. Methods：40 cases with bimaxillary dentoalveolar protrusion were divided into 2 groups（n =20）.After extraction of all first premolars of each case,the patients were treated by Empower appliance and Damon3-Mx appliance respectively without palatal enhance measure. Before and after treatment the patients were examined by cephalometric roentgengraphy with 1 9 measurements,the data were analysed by independent sample t test.Results：Tooth indicators∠UI-SN,∠UI-PP,∠L1 -MP,∠U1 -L1 ,UIE-PTV and LIE-PTV before and after the treatment in each group,and the variations between the 2 groups were significantly different（P 〈0.05）.UM-PTV,LM-PTV, UIA-PTV,LIA-PTV,UL-EP,LL-EP and Z Angle were significant changed after treatment（P 〈0.05）,no significant difference was found between the 2 groups after treatment（P 〉0.05）.Conclusion：Empower appliance is more effective than Damon3-Mx in the treatment of bimaxillary dentoalveolar protrusion by anterior tooth torque control,upper and lower front teeth adduction and improvement of soft tissue lateral profile.