The chin problem from an orthodontist's point of view.
D005075:Biological Evolution; D002680:Chin; D004576:Electromyography; D006801:Humans; D008334:Mandible / Q000033:anatomy & histology*; D008410:Masticatory Muscles; D009970:Orthodontics; D010161:Paleodontology; D012737:Sex Factors; D013060:Speech