Esthetics, environment, and the law of lip relation.
D000222:Adaptation, Physiological; D000013:Congenital Abnormalities / Q000145:classification; D003679:Deglutition; D004955:Esthetics, Dental; D006801:Humans; D008046:Lip / Q000002:abnormalities / Q000033:anatomy & histology* / Q000502:physiology*; D009971:Orthodontics, Corrective; D014059:Tongue / Q000502:physiology; D014061:Tongue Habits