Influence of a new push-out test method on the bond strength of three resin-based sealers

AimCompare the displacement resistance of AH Plus, Ad Seal and Real Seal on dentine discs (DDs) treated with 10% citric acid, 17% EDTA or 2.5% NaOCl, through a new push-out test method. MethodologyFrom the middle third of the roots of 15 maxillary central incisors, three dentine discs 10.1mm thick were obtained. On the axial surface of each dentine disc, three 1.2-mm-wide holes were drilled. In the third dentine disc from the same root, each hole was treated with one of three irrigating solutions for 30s, rinsed with distilled water and dried. Each hole of the same dentine disc was filled with sealer, and the discs were maintained at 37 degrees C for 7days. The dentine discs were fixed on a testing machine to test the shear strength. Data were compared using the univariate anova test with a 5% significance level. The Tukey test was used for multiple comparisons. ResultsThe irrigating solutions did not affect the adhesion of the sealers (P>0.05). There was no significant difference between the Ad Seal and AHPlus (P>0.05); however, Real Seal had a significantly lower shear bond strength (P<0.05). ConclusionThe use of different irrigating solutions did not affect resistance to the displacement of resin sealers. Real Seal sealer was less resistant than Ad Seal and AHPlus.