title: Root Canal Configuration of One-rooted Mandibular Canine in an Iranian Population: An In Vitro Study.
abstract: OBJECTIVE
  A perfect endodontic treatment necessitates proper understanding of the morphology of canal and pulpal variations. This in vitro study was conducted to demonstrate the in-ternal anatomy of mandibular canine teeth in an Iranian population.
  
  
  METHODS
  The samples consisted of 100 extracted mandibular permanent canines. The roots of the teeth were molded in acrylic boxes. The crowns of the teeth were cut and 2 mm cross sections were made from CEJ to the apex. Sections were examined using stereomicroscope to reveal the number and location of root canals.
  
  
  RESULTS
  From 100 evaluated teeth, 12 (12%) had 2 canals from which 5 had type II canal configu-ration and 7 (7%) had type III. 88% of the specimens had one canal and none were seen to be of type IV.
  
  
  CONCLUSIONS
  The findings of this study emphasize the importance of dentist's knowledge of varia-tions in root canal morphology, since leaving a canal untreated is one of the main reasons of endodontic failures. When treating mandibular canines, the existence of a second canal should be taken into consideration.
authors.affiliation: Assistant Professor, Department of Oral Medicine, Faculty of Dentistry, Hamadan University of Medical Sciences, Iran.
authors.forename: Pejman
authors.initials: P
authors.lastname: Bakianian Vaziri
authors.forename: Shahin
authors.initials: S
authors.lastname: Kasraee
authors.forename: Hamid Reza
authors.initials: HR
authors.lastname: Abdolsamadi
authors.forename: Shermin
authors.initials: S
authors.lastname: Abdollahzadeh
authors.forename: Farzad
authors.initials: F
authors.lastname: Esmaeili
authors.forename: Shahrzad
authors.initials: S
authors.lastname: Nazari
authors.forename: Mohammad
authors.initials: M
authors.lastname: Vahedi
keywords: Mandibular canine; root canal configuration; root canal therapy