title: A study of class II division 1 malocclusions treated by the Andresen appliance.
mesh_terms: D000202:Activator Appliances; D005147:Facial Bones / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008445:Maxillofacial Development; D009968:Orthodontic Appliances, Removable; D012189:Retrospective Studies; D013997:Time Factors; D014087:Tooth Movement Techniques