Estabilidade de cor de cerâmicas vítreas submetidas a diferentes protocolos para polimento após armazenamento em solução ácida corante

Abstract

The advancement of modern dentistry has driven the use of vitreous ceramics for aesthetic and functional restorations. However, surface treatments and daily habits, such as coffee consumption, can affect their optical properties. This study aimed to investigate the effects of different surface treatments (Glaze, Optragloss, Ceramisté, and Ceram) and immersion in coffee solution on the translucency, contrast, and opalescence of dental ceramics made of lithium disilicate (LD), zirconia-reinforced lithium silicate (VS and CD), and an additional fired version (CD-AF). Sixty specimens of each material were fabricated, subjected to different polishing protocols, and then immersed in coffee for 12 days. Optical properties were evaluated using a spectrophotometer before and after immersion. Data were statistically analyzed using Aigned Rank Transform (ART) and Tukey's post hoc tests. It was observed that Glaze (GL) treatment resulted in a greater change in translucency for the CD-AF, LD, and VS groups, while the DH (Ceram) protocol showed greater stability. For contrast, the DH protocol also presented the most stable results, with less alteration after pigmentation. It was concluded that different surface treatments significantly influence the optical properties of the ceramics evaluated after immersion in coffee, with mechanical polishing using the Ceram (DH) system providing the greatest maintenance of original translucency and contrast.