Chulalongkorn University Dental Journal

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This article is a case report of conventional endodontic therapy for a left maxillary second premolar with three root canals. The incidence of three canals at the apex of the maxillary second premolar has been reported to be 0.3-1.0%. This anatomical variation of root canal system can be challenging in endodontic treatment. The patient was 44 year-old female that needed the root canal treatment on tooth # 25 with three canals. Therefore, thorough knowledge of the root canal anatomy and its variation, careful interpretation of the preoperative radiographs and access cavity modification are essential for enhancing intracanal preparation, disinfection and obturation. Only then, a predictable endodontic therapy of the three-canalled maxillary second premolar can be accomplished. In two years recall demonstrated success both clinically and radiographically.



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