title: Functional orthodontics: past, present, future.
authors.forename: T
authors.initials: T
authors.lastname: Spahl
mesh_terms: D006801:Humans; D008312:Malocclusion, Angle Class II / Q000628:therapy; D008445:Maxillofacial Development; D017289:Orthodontic Appliances, Functional; D009972:Orthodontics, Interceptive / Q000639:trends*