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

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° (P0.01)and 12.25°(P0.01),UIC-PP reduced 1.32mm(P0.05),U1-NA reduced 4.16mm(P0.01),LI-MP reduced 2.82mm (P0.05),LIC-MP reduced 2.08mm (P0.05),overbite and overjet were reduced 2.03mm,3.94mm (P0.01). 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.