title: Retrieval of broken instrument from root canal.
mesh_terms: D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging; D005547:Foreign Bodies / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012390:Root Canal Therapy / Q000295:instrumentation*