title: Changes in molar occlusion after extraction of all first pre-molars: a follow-up study of Class II division 1 cases treated with removable appliances.
mesh_terms: D001641:Bicuspid / Q000601:surgery*; D003766:Dental Occlusion; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D008963:Molar / Q000033:anatomy & histology*; D009968:Orthodontic Appliances, Removable; D012690:Serial Extraction; D014087:Tooth Movement Techniques