Timed extractions.
D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D003724:Dental Arch / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005882:Gingival Diseases / Q000209:etiology; D006801:Humans; D007180:Incisor; D007571:Jaw Diseases / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology; D003765:Models, Dental; D008963:Molar; D010347:Patient Care Planning; D010808:Physical Examination; D011859:Radiography; D012690:Serial Extraction; D013997:Time Factors; D014079:Tooth Eruption, Ectopic / Q000209:etiology; D014094:Tooth, Deciduous / Q000601:surgery*