Tip-Edge技术Ⅰ期矫治成人Ⅱ类1分类错的临床研究

Clinical study on the first stage treatment of Class Ⅱ division 1 malocclusion adult patients by Tip-Edge technique

目的:观察Tip-Edge矫治技术Ⅰ期矫治成人Ⅱ类1分类错的临床疗效,并对其机制进行初步探讨。方法:20例成人Ⅱ类1分类错畸形患者采用Tip-Edge矫治技术进行治疗,Ⅰ期矫治结束后通过对患者治疗前后相关的头影测量项目进行统计分析。结果:20例患者Ⅰ期矫治平均疗程为4.6个月。X线头影测量结果显示,患者咬合打开前后,U1-NA、U1-SN分别减小13.68°(P<0.01)和12.25°(P<0.01),UIC-PP减小1.32mm(P<0.05),U1-NA减小4.16mm(P<0.01),LI-MP减小2.82mm(P<0.05),LIC-MP减小2.08mm(P<0.05),覆、覆盖分别减小3.94mm(P<0.01)和2.03mm(P<0.01),其他各项测量指标无明显变化。结论:对于成人Ⅱ类1分类错畸形患者,Tip-Edge技术可以通过快速压低上、下颌前牙,改善上下颌前牙的倾斜度矫正深覆、深覆盖。

Objective To investigate the first stage treatment of Class Ⅱ division 1 malocclusion adult patients with deep overbite by Tip-Edge technique and explore the treatment mechanics. Methods 20 cases of Class Ⅱ adult patients with deep overbite were treated by Tip-Edge technique in clinic. Cephalometric analysis were made before and after first stage treatment. Paired t test was employed for the statistical analysis with SPSS14 software. Results The average period of the first stage treatment is 4.6 months. Cephalometric analysis shows that UI-NA and U1-SN reduced 13.68° （P〈0.01）and 12.25°（P〈0.01）,UIC-PP reduced 1.32mm（P〈0.05）,U1-NA reduced 4.16mm（P〈0.01）,LI-MP reduced 2.82mm （P〈0.05）,LIC-MP reduced 2.08mm （P〈0.05）,overbite and overjet were reduced 2.03mm,3.94mm （P〈0.01）. Other indices were no significant changes. Conclusion Tip-Edge technique can be used effectively for deep bite correction by anteriors intrusion and correct the Class Ⅱ division 1 malocclusion adult patients comfortably and rapidly.