title: Healing of an extensive periradicular lesion subsequent to a proper endodontic treatment of a mandibular first premolar with complex anatomy.
abstract: Long-term success of endodontic treatment is strictly dependent on proper shaping and cleaning of the root canal system followed by obturation of entire prepared space. Anatomical variations should be considered during radiographic and clinical evaluation as parts of endodontic treatment. A mandibular premolar with three canals is quite rare and such a tooth requires special canal preparation and obturation techniques. An astute clinician should identify different canal configurations and treat them endodontically well, because presence of an untreated canal could be a reason for failure of endodontic treatment. This paper describes the conventional orthograde endodontic therapy on an unusual mandibular first premolar with three root canals.
authors.affiliation: Department of Endodontics, Shahid Beheshti University of Medical Science, Tehran, Iran.
authors.forename: Hengameh
authors.initials: H
authors.lastname: Ashraf
authors.affiliation: Department of Endodontics, Shahid Beheshti University of Medical Science, Tehran, Iran.
authors.forename: Payam
authors.initials: P
authors.lastname: Paymanpour
authors.affiliation: Department of Endodontics, Shahid Beheshti University of Medical Science, Tehran, Iran.
authors.forename: Maryam Mojtahed
authors.initials: MM
authors.lastname: Bidabadi
authors.affiliation: Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Reihaneh
authors.initials: R
authors.lastname: Hajrezai