The impacted maxillary incisor.
D002648:Child; D006801:Humans; D007180:Incisor; D008446:Maxillofacial Injuries / Q000150:complications; D011859:Radiography; D014095:Tooth, Impacted / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D014096:Tooth, Supernumerary / Q000150:complications