First permanent molars subjected to mortal amputation before maturation of roots. 1. Roentgenographic periradicular changes and peripheral root resorption after four years' observation.
D002648:Child; D002675:Child, Preschool; D003787:Dental Pulp Devitalization; D005500:Follow-Up Studies; D006801:Humans; D011859:Radiography; D012391:Root Resorption / Q000000981:diagnostic imaging; D014091:Tooth Resorption / Q000000981:diagnostic imaging*; D014092:Tooth Root / Q000254:growth & development*