Comparison of Face Mask Appliance and Frnkel Appliance on Patients with Class III Malocclusion

Objective To evaluate the treatment effects of Frnkel appliance and face mask appliance for class Ⅲ malocclusion. Methods Fourty patients with class Ⅲ malocclusion were divided into two groups and treated with Frnkel appliance and face mask appliance. Cephalometric analysis were performed. Seven linear and 17 anglar measurements were analyzed on each radiograph. Results Both groups yielded an increase of SNA angles, face mask group was more significantly than Frnkel group. Both appliances appeared to produce minimal change in ANB angles. The mandibular retracted backward and downward in two groups. In Frnkel group upper incisor inclined labially and lower incisor inclined lingually. Conclusion Face mask group produced more skeletal effects but Frnkel group produced more dental effects. Soft tissue profile were improved in two groups.;