title: [Left maxillary first molar with three mesiobuccal canals: a case report].
abstract: A case of unusual root canal morphology was presented to demonstrate anatomic variations in maxillary  first molars. This paper reported the case of a maxillary left first molar that presented three root canals in  the mesiobuccal root. Root canal therapy and case management were described. This report points out the  importance of looking for additional canals.
authors.affiliation: Department of Stomatology, Peking University Third Hospital, Beijing 100191, China. kqzhangping@163.com
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Li-sha
authors.initials: LS
authors.lastname: Mao
mesh_terms: D000328:Adult; D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008437:Maxilla; D008963:Molar / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011859:Radiography; D012390:Root Canal Therapy / Q000379:methods*; D014092:Tooth Root / Q000033:anatomy & histology* / Q000000981:diagnostic imaging