Myofunctional Orthodontic Therapy in Class III Dentoskeletal Malocclusion Using Myobrace Appliance and Inclined Bite Plane: Case Report

Abstract

Introduction: Class III malocclusion has previously been one of the most difficult to treat. Regardless of this fact, no child has ever been born with class III malocclusion; it always develops over the time. This alteration can be associated to bad habits which if continuously repeated, can cause functional anomalies of the orofacial musculature. Class III malocclusion can be treated in early age with myofunctional therapy. Case Report: A 7 years old male complained his crossbite anterior and concave profile. The parents reported that he likes to protruding the lower jaw and breath through the mouth. Cephalometric showed SNA 78o, SNB 81o, ANB -3o with overjet -2 mm, overbite 5 mm. This case was diagnosed as class III dentoskeletal malocclusion. Discussion: The patient was treated with myobrace i-3N for four months to correct the mouth breathing habit where after four months treatment, myobrace i-3R for arch development for 6 months, inclined bite plane 2 months, and myobrace i-3H for 6,5 months. After 16.5 months of treatment, facial profile changes were achieved (concave to straight), corrected gummy smile, corrected anterior and posterior crossbite, class I molar dental relations, 0.5 mm overjet, and 1 mm overbite. Conclusion: Myobrace appliance followed with myobrace activity may be a good choice for correction class III dentoskeletal malocclusion with mouth breathing habit in growing age.