Análise da interação química de cimento de ionomero de vidro convencional após diferentes protocolos de proteção superficial

Abstract

Glass ionomer cement (GICc) is a restorative material widely used in dentistry. Its unique properties make it a popular choice in different clinical situations and it is widely indicated in the philosophy of conservative dentistry. However, despite its advantages, it has some limitations because it is susceptible to chemical reactions such as syneresis and imbibition, which can promote chemical, physical and mechanical changes in the material. Therefore, the objective of this study was to evaluate GICc after sorption and solubility challenges, in addition to evaluating the pH of different surface protection materials. This is a controlled in vitro laboratory study. Five different surface protection material protocols were analyzed according to the experimental groups: liquid petroleum jelly, solid petroleum jelly, liquid glycerin, nail base, adhesive and without application. After the production of GICc samples, weighing was performed for the imbibition test at the following times: immediate; 24 hours, 7 days and 14 days after immersion in distilled water. For the solubility test, the samples were weighed immediately and 14 days later in the desiccator. The pH analysis was obtained with the aid of indicator strips. The data were tabulated for descriptive analysis and submitted to the one-way ANOVA test, supplemented by Tukey 5%. In the sorption test, the group without application showed no difference from the liquid petroleum jelly, nail base and adhesive group (p>0.05), and the solid petroleum jelly and liquid glycerin groups showed no statistical difference (p<0.032). In the solubility test, the group without application showed no difference from the liquid petroleum jelly, nail base and adhesive group (p>0.06). The solid petroleum jelly and liquid glycerin groups showed a statistically significant difference (p<0.01). The pH values of the materials showed acidity, with the nail base having the lowest mean value (4±0.0). The use of liquid glycerin promoted lower sorption results, while solid petroleum jelly showed better results in solubility control.