Abstract
This case report describes the treatment of 21-year-8-month-old female with a classⅡmolar relationship on a ClassⅡ skeletal base complicated by an anterior openbite. The treatment involved myofunctional therapy and extraction of the upper first premolars and lower second premolars. Pre-adjusted lingual edgewise appliances were used in both the upper and lower arches. As a result, a Class Ⅰmolar relationship with ideal overjet and satisfactory facial profile were achieved during treatment. The resulting occlusion was maintained during 2-year-2-month retention period.
