Concerning recent articles on Fränkel appliance therapy.
D000202:Activator Appliances; D005147:Facial Bones / Q000033:anatomy & histology*; D006801:Humans; D008334:Mandible / Q000033:anatomy & histology; D009968:Orthodontic Appliances, Removable; D063173:Retrognathia / Q000473:pathology / Q000628:therapy