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BioMed Research International
Volume 2018, Article ID 8170620, 8 pages
Research Article

Cone-Beam Computed Tomographic Evaluation of Root Canal Morphology of Maxillary Premolars in a Saudi Population

1Division of Endodontics, Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
2Endodontist, Ministry of Health, Saudi Arabia
3Endodontic Division, Restorative Department, Majmaah University, Saudi Arabia
4General Practitioner, Riyadh, Saudi Arabia

Correspondence should be addressed to Abdullah Alqedairi; as.ude.usk@iriadeqlaa

Received 19 May 2018; Accepted 9 August 2018; Published 15 August 2018

Academic Editor: Mirella Falconi

Copyright © 2018 Abdullah Alqedairi 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.


Objective. The aim of the study was to investigate the root canal morphology of maxillary first and second premolars in a Saudi population using Cone-Beam Computed Tomography (CBCT). Methods. This retrospective cross-sectional study assessed CBCT images of 707 Saudi patients. The number of roots and canal configuration were identified based on Vertucci’s classification. Fisher’s exact Chi-square tests were performed to analyze the association between sex and number of roots and sex and root canal configuration. Results. Most teeth had two roots in maxillary first premolars (75.1%) and one root in maxillary second premolars (85.2%). Type IV was the most prevalent canal configuration in maxillary first premolars (69.1%), while Type I was the most in maxillary second premolars (49.4%). All types of canal configurations were observed in maxillary premolars except Type VII for the maxillary second premolar. Chi-square tests showed no significant association between gender and number of roots and sex and root canal configuration in both maxillary first and second premolars although higher number of roots was seen in men (P > 0.05). Conclusion. Most maxillary first premolars had two roots with Type IV being the most predominant canal configuration, while a single root with Type I canal configuration was the most frequently observed morphology in maxillary second premolars. In maxillary first premolars, 21.3% had one canal apically, 75.4% had two canals apically, and 3.3% had three canals apically. In maxillary second premolars, 80.2% had one canal apically, 18.9% had two canals apically, and 0.9% had three canals apically.