title: Incidence of patent furcal accessory canals in permanent molars of a Turkish population.
abstract: OBJECTIVE
  To determine the incidence of patent furcal accessory canals in permanent molars of a Turkish population.
  
  
  METHODS
  Two-hundred extracted teeth consisting of 50 maxillary first molars, 50 maxillary second molars, 50 mandibular first molars and 50 mandibular second molars from Turkish patients attending the Oral Surgery Department of the Faculty of Dentistry, Istanbul University, Istanbul, Turkey, were included in the study. After preparation of access cavities and removal of pulp tissue, the teeth were stored in 5.25% sodium hypochlorite for 1 h. Following double-sealing of the access cavities, all tooth surfaces except the furcation regions were covered with nail varnish. The teeth were stored in 0.5% basic fuchsin for 1 week. The teeth were sectioned at the cemento-enamel junction and the presence of patent furcal canals was established by examining the pulp chamber floor with a stereomicroscope (10x) to determine staining.
  
  
  RESULTS
  Patent furcal accessory canals were detected in 24% of maxillary first molars, 16% of maxillary second molars, 24% of mandibular first molars, and 20% of mandibular second molars. No statistically significant differences were found between the tooth types.
  
  
  CONCLUSIONS
  In a Turkish population, the incidence of patent furcal accessory canals on the pulp chamber floor of maxillary and mandibular first and second molars ranged between 16 and 24%.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: F
authors.initials: F
authors.lastname: Haznedaroğlu
authors.forename: H
authors.initials: H
authors.lastname: Ersev
authors.forename: H
authors.initials: H
authors.lastname: Odabaşi
authors.forename: G
authors.initials: G
authors.lastname: Yetkin
authors.forename: B
authors.initials: B
authors.lastname: Batur
authors.forename: S
authors.initials: S
authors.lastname: Aşçi
authors.forename: H
authors.initials: H
authors.lastname: Işsever
mesh_terms: D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D006801:Humans; D008963:Molar / Q000033:anatomy & histology*; D014092:Tooth Root / Q000033:anatomy & histology*; D014421:Turkey