Abstract
The effect of eugenol-containing cements on the bond strength of three composite core resins to dentin were examined both before and after thermocycling.
The following results were obtained.
1. Dentin surfaces after removing eugenol-containing and eugenol-free cements with dental excavator were free of other cements by examining with the naked eye, however, from SEM observation a little cement remained on its surface.
2. The remaining cements on the dentin surface influenced the bond strength of three composite core resins to dentin differently.
3. Clearfil DC Core demonstrated the highest bond strength both before and after thermocycling. This means that Clearfil DC Core is little influenced by eugenol.
4. Core Max II demonstrated comparatively high bond strength before thermocycling, however, after thermocycling it decreased significantly.
5. The bond strength of Clearfil Photo Core was effected by some eugenol-containing cements both before and after thermocycling.
