Influência do envelhecimento na rugosidade superficial, molhabilidade e estabilidade de cor de resinas acrílicas utilizadas em restaurações protéticas temporárias sobre implantes

Abstract

Objective: To evaluate the influence of aging on surface roughness, wettability, color stability of four temporary prosthetic restorative materials on implants. Methodology: 240 specimens were made (6x6x2 mm), divided into 4 groups: RA (chemically activated acrylic resin), RB (bisacrylic resin), RC (CAD/CAM acrylic resin) and DE (stock tooth), in which half of the samples, 30 from each group, were subjected to the aging process. Roughness was evaluated using a profilometer (Sq in µm), wettability using Surftens Software (contact angle θC.) and color stability tested using a ShadeEya NCC colorimeter (CIE-Lab). Data were analyzed using 1-way Analysis of Variance (ANOVA) and paired t-test, with a significance level of 5%. Results: For pre-aging roughness, the indirect groups, RC and DE, showed significantly lower mean roughness compared to the direct ones with values of RC 0.379(±0.272)A and DE 0.289(±0.228)A while RA and RB presented 1.808 (±2.187)B RB 1.744(±0.951)B respectively. Aging resulted in a decrease in roughness in all groups and maintained the same patterns between direct and indirect. A greater contact angle was observed in all groups after aging, with no difference between groups. RC showed better color stability. Conclusion: Aging positively impacted roughness conditions in all groups, with RC showing better color stability.