Comparative Evaluation of Compressive Strength and Flexural Strength of GC Gold Hybrid, GIC Conventional and Resin-modified Glass-ionomer Cement

PURPOSE: The aim of the study was to emphasize the compressive strength and flexural strength of glass-ionomer cement (GIC)–gold hybrid, conventional GIC, and resin-modified GIC (RMGIC). METHODOLOGY: Three GIC materials were used in the study: group A: GC–gold hybrid (Gold Label hybrid Universal Restorative), group B: type II conventional GIC, and group C: RMGIC. A total of 120 cylindrical test specimens of dimensions 4 mm diameter × 6 mm height were prepared from a custom-made Teflon mold according to respective study groups. The specimens prepared were then stored in 20 mL of deionized water at 37°C for 3 h daily for 30 days, and the solutions were changed every week, after which they were tested for compressive strength and flexural strength by using a universal force testing machine. All the results were analyzed by SPSS software and were subjected to statistical analysis using ANOVA followed by the Bonferroni post-hoc test. RESULTS: The mean compressive strength was the highest for group A and lowest for group B. Similarly, the mean flexural strength was the highest for group A and lowest for group B. CONCLUSION: The conclusions can be drawn from this in-vitro study that the compressive strength and flexural strength of GC–gold hybrid were greater than those of RMGIC and conventional GIC.