The Effect of Addition of Titanium Oxide Nanofillers on The Water Sorption and Solubility of Resin Based Composite (An In Vitro Study)

Abstract

Background and Objectives: The aim of this study was to measure the water sorption (Wsp) and water solubility (Wsl) of modified microhybrid composite resins by adding Titanium oxide nanofillers in four concentration 0.5% , 1%, 3% and 5% and comparing them to unmodified microhybrid composite resins and to nanofilled composite resin. Methods: For water sorption (Wsp) and solubility (Wsl), ten disk-shaped specimens of each resin composite were made for each group and stored in desiccators until constant mass was achieved. Specimens were then stored in water for 7 days, and the mass of each specimen was measured. The specimens were dried again and weighed. The Wsp and Wsl were calculated from these measurements. Data analyzed by one-way ANOVA. Results: The results showed there were significant differences among the groups in the Wsp mean values which ranged from 20.2120 to 28.4680 μg/ mm³, while the Wsl mean values were ranged from 1.1060 to 5.6800 μg/ mm³. Conclusion: The addition of TiO2 nanofillers to microhybrid composite increased the Wsp and Wsl values compared to the control group but still lower than the value established by the ISO 4049 standard