title: Comparative Resistance of AH26 and a New Sealer Prototype to a Bacterial Challenge.
abstract: 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 = 20) contained Resilon and AH 26 sealer and roots in group 2 (n = 21) 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 = 0.053). 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.
authors.affiliation: Department of Endodontics, UNC School of Dentistry, Chapel Hill, NC 27599, USA.
authors.forename: Derek
authors.initials: D
authors.lastname: Duggan
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhong
authors.forename: Eric
authors.initials: E
authors.lastname: Rivera
authors.forename: Roland
authors.initials: R
authors.lastname: Arnold
authors.forename: Eric
authors.initials: E
authors.lastname: Simmons