Indian Board of Orthodontics Case Report: Management of Class II Skeletal Malocclusion Using 2-Phase Treatment

Abstract

KL, a 12-year-old boy, presented with a class II Div I malocclusion on a class II skeletal base (retrognathic mandible) with a 7-mm overjet and a horizontal growth pattern. He had a convex profile, incompetent lips, lip trap, deep mentolabial sulcus, everted lower lip, and positive visual treatment objective (VTO). KL had a CS2 cervical maturation stage, which indicates 65% to 85% adolescent growth remaining. Treatment involved growth modification using a removable Twin Block with midpalatal expansion screw. This was followed by upper and lower fixed appliance using 0.022” × 0.028” slot Mclaughlin Bennet and Trevisi (MBT) prescription. The retention protocol involved upper wrap around and lower lingual bonded retainer.