Mechanical and dentin bond strength properties of the nanosilver enriched glass ionomer cement

Abstract

Background: The aim of this study was to investigate the mechanical properties and dentin microshear bond strength of a conventional glass ionomer cement (GIC) compared to GIC supplemented with silver nanoparticles (SNPs) at 0.1 and 0.2 (w/w). Material and Methods: SNPs were incorporated into a conventional GIC at 0.1 and 0.2 (w/w). The unmodified GIC was used as the control group. Compressive strength, flexural strength, and micro-shear bond strength (microSBS) to dentin were evaluated using a universal testing machine. Surface microhardness was determined using a Vickers microhardness tester. The data were analyzed using one-way analysis of variance (ANOVA) and Tukey's test. Results: GICs containing 0.1 and 0.2 (w/w) SNPs significantly improved compressive strength, surface microhardness, and dentin microSBS compared to the unmodified GIC (p<0.05). A significant increase in the flexural strength was found for the GIC containing 0.2 (w/w) SNPs (p<0.05). However, the GIC containing 0.1 (w/w) SNPs did not affect flexural strength. Conclusions: GIC supplemented with SNP is a promising material for restoration because of its improved mechanical and bond strength properties. Therefore, it may be suggested for use especially in higher stress-bearing site restorations. Key words:Glass ionomer cement, mechanical properties, micro-shear bond strength, silver nanoparticle.