Bond strength to root dentin and fluid filtration test of AH Plus/gutta-percha, EndoREZ and RealSeal systems
Journal of Applied Oral Science
Print version ISSN 1678-7757
J. Appl. Oral Sci. vol.21 no.4 Bauru July/Aug. 2013
http://dx.doi.org/10.1590/1678-775720130114
OBJECTIVES:
To investigate the bond strength and seal ability produced by AH
Plus/gutta-percha, EndoREZ and RealSeal systems to root canal dentin.
MATERIAL AND METHODS:
Sixty extracted single-root human teeth, instrumented manually to size 40, were
divided into three groups (n=20) according to the sealer used; G1: AH Plus, G2:
EndoREZ, and G3: RealSeal sealers. After filling using the lateral condensation
technique, each sealer group was randomly divided into two subgroups according to
the tests applied (n=10 for µPush-out test and n=10 for fluid filtration test). A
fluid filtration method was used for quantitative evaluation of apical leakage.
Four 1-mm-thick slices (cervical and medium level) were obtained from each root
sample and a µPush-out test was performed. Failure modes were examined under
microscopy at 40x, and a one-way ANOVA was applied to analyze the permeability.
Non-parametrical statistics for related (Friedman's and Wilcoxon's rank tests) or
unrelated samples (Kruskal-Wallis' and Mann-Whitney's tests) allowed for
comparisons of µPush-out strength values among materials at the different levels.
Statistical significance was accepted for p values <.05.
RESULTS:
There are no significant differences among fluid filtration of the three sealers.
The sealer/core material does not significantly influence the µPush-out bond
strength values (F=2.49; p=0.10), although statistically significant differences
were detected with regard to root level (Chi2=23.93; p<0 .001="" ah="" and="" bond="" dentin="" higher="" in="" intraradicular="" medium="" obtained="" p="" plus="" realseal="" root="" slices.="" strength="" the="" to="">
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