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International Journal of Dentistry
Volume 2012, Article ID 365231, 5 pages
Research Article

Comparative Resistance of AH26 and a New Sealer Prototype to a Bacterial Challenge

1Department of Endodontics, UNC School of Dentistry, Chapel Hill, NC 27599, USA
2Diagnostic Sciences and General Dentistry, UNC School of Dentistry, Chapel Hill, NC 27599, USA
3Dental Research Center, UNC School of Dentistry, Chapel Hill, NC 27599, USA

Received 15 November 2011; Accepted 13 December 2011

Academic Editor: Silvio Taschieri

Copyright © 2012 Derek Duggan 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. This study compared the leakage resistance of a New Sealer Prototype (NSP) with a traditional sealer (AH 26) in Resilon-filled roots subjected to a bacterial challenge. Study Design. 41 roots were instrumented to ISO size 50 apically. Group 1 ( 𝑛 = 2 0 ) contained Resilon and AH 26 sealer and roots in group 2 ( 𝑛 = 2 1 ) contained Resilon and NSP. Roots were embedded in a dual-chamber model with the upper chamber containing Streptococcus mutans inoculum. Evidence of bacterial penetration was observed for 1 month. Fisher's Test was used to analyze the data. Results. 8 of 20 roots (40%) in the AH 26 group demonstrated leakage whereas 3 of 21 roots (14%) in the NSP group leaked. The difference in leakage rates was not statistically significant ( 𝑃 = 0 . 0 5 3 ). Conclusion. The traditional sealer (AH 26) demonstrated increased leakage rates compared to the New Sealer Prototype (NSP), but the difference did not reach statistical significance in this study.