Treatment effects of myofunctional appliances in different jaw rotations in Class II division 1 malocclusion

Abstract

Aim This retrospective study was conducted to determine skeletal, dentoalveolar changes in children treated with Twin Block or activator for the treatment of Class II Division 1 malocclusion with different jaw rotations. Materials and Methods Standardized lateral cephalograms of 32 patients (18 boys, 14 girls) between the ages of 11 and 14 years were chosen and divided into two groups, high angle (FMA >27) and low angle (FMA <20). Cephalograms were taken at T1 (pre-treatment) and T2 (after one year of myofunctional therapy).These were manually traced and analysed. Results The results showed statistically significant increase in SNB angle, VRP-Pog due to forward movement of the mandible. The overjet reduced significantly due to retroclination of upper incisors and proclination of lower incisors in both groups. Conclusion It was concluded that both high angle and low angle groups responded equally well to myofunctional therapy showing significant skeletal and dentoalveolar changes.