The Effect of Eugenol-Containing Temporary Cement on the Bond Strength of Two Resin Composite Core Materials to Dentin

Purpose This study investigated the effect of eugenol‐containing temporary cement on the bond strength of two resin composite core materials (FluoroCore and Ti‐Core) to dentin. Materials and Methods Dentin was exposed in three groups of extracted teeth (20 specimens each). In group one, dentin was covered with eugenol‐containing temporary cement; the second group was covered with eugenol‐free temporary cement; and the third group was left uncovered and served as a control group. All specimens were stored for 1 week at 37°C and 100% humidity. The dentin surfaces were cleaned and treated using the GLUMA adhesive system, followed by placement of composite core build‐ups. Debonding of the core material was accomplished using the Accuforce Elite test system. Results There was a significant reduction in bond strength for the specimens covered with eugenol temporary cement (p < .0001), but no significant difference was found between the control group and the group treated with eugenol‐free temporary cement. Bond strength of the Ti‐Core material to dentin was significantly higher than that of FluoroCore (p < .0001). Conclusion Pretreatment of the dentin with eugenol‐based temporary cement adversely affects the bond strength of resin composite core material to dentin.