title: Root canal therapy of a mandibular first molar with five root canals: a case report.
abstract: A mandibular first molar requiring root canal therapy was found with five canals, three mesial canals, and two distal canals. Initially, four canals (mesiobuccal, mesiolingual, distobuccal, and distolingual) were identified. The mesiobuccal and mesiolingual canals were found in their normal locations, and a fifth canal was noted between these two. This case demonstrates a rare anatomical configuration and supplements previous reports of the existence of such configurations in mandibular first molars.
authors.affiliation: 1. Department of Endodontics, Dental School, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Mohammad Frough
authors.initials: MF
authors.lastname: Reyhani
authors.forename: Saeed
authors.initials: S
authors.lastname: Rahimi
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shahi
keywords: Case Report; Mandibular First Molar; Root Canal Therapy