The effect of different root canal sealers on the bond strength of titanium ParaPosts luted with two cements

PurposeThis study evaluated the effect of different root canal sealers (eugenol- and noneugenol-based) on the bond strength of prefabricated titanium ParaPosts luted with either zinc phosphate or resin cements.Materials and methodsOne hundred and sixty-eight single rooted teeth were included in this study. Teeth were distributed into seven groups (24 teeth each) according to type of root canal sealer used. Root canals were prepared and obturated with gutta percha and using one of the seven root canal sealers: AH26, Endoseal, Topseal, Sealapex, EndoREZ, Endofil, or Tubli-seal. Prefabricated titanium ParaPosts were luted with either zinc phosphate or RelyX ARC resin cements. The required force for the dislodgment of posts from their prepared spaces was recorded using a universal testing machine. Data were statistically analyzed using one- and two-way ANOVA, Tukey post hoc and the Student’s t-test.ResultsWithin the resin cement groups, the Endofil and Tubli-seal (eugenol-based sealers) groups had significantly reduced bond strength compared with other groups (P < 0.05). Within the zinc phosphate cement groups, there were no significant differences between the post retention means (P > 0.05). Comparing the two cements, there were significant differences within the Sealapex, Endofil, and Tubli-seal groups (P < 0.05).ConclusionEndofil and Tubli-seal (eugenol-based) reduced the bond strength of prefabricated ParaPosts luted with RelyX ARC resin cement. The type of sealer used had less effect on the retention of posts that were luted with zinc phosphate cement than those luted with resin cement.