The effect of different methods for the early treatment of Angle class II division 1 malocclusion on mandibule

Objective To investigate the treatment effects of Edgewise and Twin-block appliances in skeletal class Ⅱ division 1 malocclusion on mandibule.Methods Thirty patients with skeletal class Ⅱ division 1 malocclusion,whose age from 11 to 14 years old were divided into two groups.One group was treated with standard Edgewise appliance (E group),the other was treated with Twin-block functional appliance (T group).The cephalometric data before and after treatment was analysed statistically.Results Conclusion Edgewise appliance with class Ⅱ elastic corrected the distal occlusion,the relation of skeletal was not improved.Functional treatment could promote mandibular growth obviously and increase mandibular length in sagittal direction.