Compliance-free Class II correction and its relationship to vertical facial characteristics

• Main Author: Shoff, Michael
• Format: Others
• Published: VCU Scholars Compass 2012
• Subjects: Class II; Forsus; Functional appliance; Dentistry; Medicine and Health Sciences
• Online Access: http://scholarscompass.vcu.edu/etd/2696; http://scholarscompass.vcu.edu/cgi/viewcontent.cgi?article=3695&context=etd

Background: While efficacy of the Forsus appliance has been shown, there are disagreements on its mechanism for Class II correction. Class II studies have been criticized for ignoring potential differences in results based on differing vertical facial phenotypes. The purpose of this study was to better understand the effects of Class II correction using the Forsus appliance and relate changes during and at the completion of treatment to initial MP-SN angles. Materials and Methods: Records of 59 patients obtained at 4 different time points were examined retrospectively. ANOVA was used to describe the cephalometric changes and Pearson’s correlation tested for any relationship between patients’ pretreatment MP-SN angle and other selected measures. Results/Conclusions: Class II correction was achieved by mesial movement of the mandibular dentition, differential mandibular growth, and clockwise rotation of the occlusal plane. There was no correlation between pre-treatment MP-SN angles and any selected cephalometric measure.