title: Problems faced by fixed & functional schools of thought in pursuit of orthodontic excellence.
authors.forename: T J
authors.initials: TJ
authors.lastname: Spahl
mesh_terms: D006801:Humans; D008310:Malocclusion / Q000628:therapy; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000379:methods*