title: A mandibular second premolar with three canals and atypical orifices.
abstract: Mandibular second premolars with three canals (Type V, Vertucci) and separate foramina are very rare. The anatomy of the pulp chamber floor in these premolars usually reveals one lingual and two buccal orifices at the same level. This case report describes a second premolar with three canals and an unusual pulpal floor anatomy with one distobuccal and one distolingual orifice at the same level and an orifice on the mesiolingual wall. Very careful examination of the pulpal space, preferably with an optical device, is recommended to locate any unusual orifices.
authors.affiliation: Department of Endodontics, Dental School and Research Center for Pharmaceutical Nanotechnology, Tabriz University (Medical Sciences), Tabriz, Iran.
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Lotfi
authors.forename: Sepideh
authors.initials: S
authors.lastname: Vosoughhosseini
authors.forename: Vahid
authors.initials: V
authors.lastname: Zand
authors.forename: Ali
authors.initials: A
authors.lastname: Fatemi
authors.forename: Vahab
authors.initials: V
authors.lastname: Shyezadeh
authors.forename: Bahram
authors.initials: B
authors.lastname: Ranjkesh
mesh_terms: D001641:Bicuspid / Q000033:anatomy & histology*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008334:Mandible; D014092:Tooth Root / Q000033:anatomy & histology*; D055815:Young Adult