Orthopedic Treatment of Skeletal Class III Malocclusions With Maxillary Deficiency

Abstract

Objective: The purpose of this study was to compare the treatment effects of a double-plate appliance (DPA) and a double-plateappliance and facemask combination (DPA-FM) in correcting Class III malocclusions.Materials and Methods: The material consisted of lateral cephalometric radiographs of 40 children with skeletal and dentalClass III malocclusion. In the first treatment group, 13 patients (mean age: 10 years 3 months) were treated with DPA. In thesecond treatment group, 15 patients (mean age: 10 years 9 months) were treated with DPA-FM. In the third group, 12 patients(mean age: 10 years 6 months) were observed without treatment for 9 months. Statistical evaluation was made by ANOVA,Duncan, and paired t tests.Results: The increases in SNA and ANB angles were significantly greater in the DPA-FM group than in the DPA group. Theproclination of upper incisors (U1/NA) and retroclination of lower incisors (L1/NB) were significantly greater in the DPA group thanin the DPA-FM group. The retroclination of lower incisors (L1/NB) in the DPA group showed a significant difference compared withthe control group. The increase in ANS-Me length was significantly greater in the DPA-FM group than in the control group.Conclusion: The DPA-FM treatment was more effective in sagittal correction of the maxilla than the DPA treatment. The dentalcontribution to Class III treatment seemed to be greater in the DPA group, but in this group vertical skeletal changes were moresatisfying. (Turkish J Orthod 2015;28:19–25)