The diagnostic line.
D002508:Cephalometry; D003724:Dental Arch; D004955:Esthetics, Dental; D005145:Face; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology; D008046:Lip; D008310:Malocclusion / Q000175:diagnosis*; D009971:Orthodontics, Corrective; D010347:Patient Care Planning; D014081:Tooth Extraction