Evaluation of solubility and sorption in water of some direct restorative materials

Abstract Introduction The solubility and sorption parameters of restorative materials are considered critical factors since they may interfere with the quality and durability of restorations. Objective The aim of this study was to evaluate the solubility and water sorption of some restorative materials. Material and method Fourteen specimens were made (10.0 mm x 2.0 mm) of each of the following material: Equia® Forte, Z100, Fuji IX/ e Vidrion R, then taken to a desiccator and weighed daily until stabilized. They were then placed in individual containers with 40mL of distilled water each and divided into two groups according to the storage time: 7 or 30 days. At the end of each period, the specimens were removed from the water, weighed, taken to the desiccator and weighed again until stabilized. The results were analyzed statistically with two-way ANOVA and Tukey. Result Except for Equia® Forte and Z100, the other materials presented a significant variation of solubility over time. As for sorption, it was noticed that only Z100 presented no significant difference in relation to the storage time, but in comparison of the materials, all had significant differences in both 7 and 30 days periods. Conclusion After storage periods of 7 and 30 days in water, the restorative materials Equia® Forte and Z100 do not present significant variation of solubility, being more stable than the materials Fuji IX and Vidrion R. The glass ionomer-based materials, Equia® Forte, Fuji IX and Vidrion R, suffer more sorption in water when compared to Z100 material in both periods.