Abstract: A dual function orthodontic appliance which permits the orthodontist a wide variety of treatment options in repositioning the teeth to achieve the most orthodontically desirable positions and in maintaining the repositioned teeth in the desired positions is provided. The orthodontic appliance of the present invention includes a palatal overlay molded to conform to the contours of the patient's hard plate and to fit securely against the gingival edge of the lingual surface of the teeth, a pair of posteriorly positioned opposed clasps, and a pair of opposed, spaced retaining and positioning wires which cross over the anterior teeth for a distance necessary to achieve the desired positioning or retaining effect. The orthodontic appliance of the present invention may be adapted to treat the lower teeth by providing in place of the palatal overlay a gingival overlay molded to conform to the periodontal structures on the lingual side of the lower teeth.