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Case Reports in Dentistry
Volume 2013 (2013), Article ID 972093, 4 pages
Case Report

Healing of an Extensive Periradicular Lesion Subsequent to a Proper Endodontic Treatment of a Mandibular First Premolar with Complex Anatomy

1Department of Endodontics, Shahid Beheshti University of Medical Science, Tehran, Iran
2Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran

Received 21 September 2013; Accepted 13 October 2013

Academic Editors: D. W. Boston, S.-I. Stratul, and E. F. Wright

Copyright © 2013 Hengameh Ashraf et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.