Background: While the advent of self-adhesive resin cements has simplified indirect restoration luting by reducing technique-sensitivity, the clinical longevity of these restorations remains fundamentally dependent on the bond strength achieved by different resin cement types to the restoration material.
Purpose: The aim of this study is to investigate the microshear bond strength of three types of resin cements (RCs) to high-viscosity glass ionomer cements (HVGICs).
Materials and Method: In an in vitro study, sixty cylindrical specimens were prepared from two HVGICs (EQUIA Forte Fil and Riva). Then, a polyvinyl chloride microtube (with 0.7mm diameter and 0.5mm height) was placed on each sample surface and was filled using various types of RCs, including conventional RC (Dou-Link), self-etch RC (Panavia F2), and self-adhesive RC (TheraCem). The μSBS of the specimens was measured after 24 hrs. and analyzed with two-way ANOVA and Tukey test (p Value< 0.05).
Results: According to the result of the two-way ANOVA test, the RCs showed a significa-nt effect on µSBS (p< 0.0001) while no significant effect was observed in HVGIC on the µSBS (p= 0.325). For both HVGICs, there was a significant difference between the µSBS of Panavia F2 and the other types of RCs (p< 0.0001) while no statistically significant diff-erence was found between Dou-Link and TheraCem (p= 0.515). No significant difference was observed between the two HVGICs according to the Tukey test results (p= 0.325).
Conclusion: Self-adhesive resin cements showed higher bond strength than other resin cement. Moreover, different types of HVGICs make no difference in the RCs bond strength when used as the core-build-up.