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Anatomy Research International
Volume 2015, Article ID 803671, 7 pages
http://dx.doi.org/10.1155/2015/803671
Research Article

Variations in the Root Form and Root Canal Morphology of Permanent Mandibular First Molars in a Sri Lankan Population

1Department of Basic Sciences, Faculty of Dental Sciences, University of Peradeniya, 20400 Peradeniya, Sri Lanka
2Faculty of Dental Sciences, University of Peradeniya, 20400 Peradeniya, Sri Lanka
3Royal Oman Air Force, Masirah Air Base, 113 Muscat, Oman
4Department of Restorative Dentistry, Faculty of Dental Sciences, University of Peradeniya, 20400 Peradeniya, Sri Lanka

Received 5 May 2015; Accepted 2 August 2015

Academic Editor: Iwao Sato

Copyright © 2015 Roshan Peiris 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.

Abstract

The present study was conducted to determine the number of roots and morphology of the root canal system of permanent mandibular first molars (M1) in a Sri Lankan population. Sample of 529 M1 teeth was used. The number of roots was examined and the lengths of the mesial and distal roots were measured to the nearest 0.01 mm. Vacuum injection protocol was used to inject China ink into the root canal system, making it transparent. Root canal morphology was recorded using Vertucci’s classification. Presence of furcation canals, position of lateral canals, intercanal communications, level of bifurcation, and convergence of the root canal system were recorded. M1 showed three roots in 4.1% of the sample. Commonest root canal morphology of the mesial root was type IV and the distal root was type I. The level of bifurcation of the root canals was commonly observed in the cervical one-third of the root while convergence was observed in the apical one-third in both roots. Prevalence of three rooted mandibular first molars is less than 5%. Mesial root showed the most variable canal morphology. Prevalence of furcation canals was 1.5% while that of middle mesial canals was 0.2%.