Influência dos métodos de acabamento na estabilidade de cor e rugodosidade de materiais protéticos provisórios

Abstract

The finish of the provisional restorations must achieve a smoothness, which reduce the surface roughness of the same, which is a trigger for the formation of biofilm and / or staining. This study evaluated how best polishing technique, among the tested, minimize surface roughness of the provisional restorations, promoting color stability. 60 bodies were made of the test piece of acrylic resin and bisacrílica resin, which had the base and sides insulated with enamel. They were then divided into 06 immersion groups (n = 10) and were subjected to experimental treatments: Control; Enhance system; kit. Edenta rubber; water sandpaper; Labordental finish; Cotton and Alcohol polish, subsequently recorded the initial surface roughness (Ra). After making the initial color was carried out in all specimens. These groups were kept in distilled water for 24 hours at 37 ° for complete polymerization and water sorption. After the samples from each group were immersed in staining solution (coffee), in two stages (1 and 7 days) to promote staining. After each immersion time, the specimens had the 2nd and 3rd color taken respectively, performed by VITA Easyshade espectrofotômentro and the results were evaluated by the scale CIE L * a * b *. Conclusion: polishing methods do not alter the surface roughness; There was color change for both resins; bisacrítica the resin is more susceptible to staining.