Affect of the Different Irradiation Time and Light Density on the Shear Bond Strength of the Bulk-fill Composites

The objective of this study is in vitro examination of the dentin bonding values of bulk-fill composites under various light densities and irradiation times. Eighty-five extracted human molars were used. While Grandio (VOCO) was used in the control group, SDR (Dentsply), X-tra Base (VOCO), Quixfil (Dentsply) and X-tra Fil (VOCO) were used in the study groups. The bonding strength groups were divided based on the light density and irradiation time. The Max. Tensile values of control group were found statistically significantly higher than those of the study groups (p=0.042, p=0.005) and no statistically significant between the study goups (p=0.005).