[The maxillary 1st premolar tooth with 3 canals: report of 2 cases].
D001641:Bicuspid / Q000002:abnormalities* / Q000000981:diagnostic imaging; D003786:Dental Pulp Cavity / Q000002:abnormalities* / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D012390:Root Canal Therapy / Q000379:methods