title: [Difficulty assessment of root canal treatment].
authors.forename: Ding-ming
authors.initials: DM
authors.lastname: Huang
authors.forename: Xue-dong
authors.initials: XD
authors.lastname: Zhou
mesh_terms: D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D011859:Radiography; D012390:Root Canal Therapy