The Frankel appliance: indication for use and explanation of function.
D000202:Activator Appliances; D005152:Facial Muscles / Q000502:physiology; D006801:Humans; D008310:Malocclusion / Q000175:diagnosis / Q000209:etiology / Q000628:therapy; D008445:Maxillofacial Development; D009968:Orthodontic Appliances, Removable; D009971:Orthodontics, Corrective / Q000379:methods; D012119:Respiration; D014059:Tongue / Q000502:physiology