Optical Behavior and Surface Analysis of Dental Resin Matrix Ceramics Related to Thermocycling and Finishing

Color preservation of esthetic dental restorative materials in the oral environment represents, besides longevity, a concern, and there is still limited knowledge related to effect aging on optical behavior resin matrix ceramics. The study analyzed finishing thermocycling ceramic material surfaces, order assess their consequences properties. Five CAD/CAM ceramics, namely polymer-infiltrated four types nanoparticle-filled resins, were selected for study, finished by polishing glazing. Thermocycling was chosen as vitro method. Surface microroughness, hardness evaluations achieved before after artificial aging. Statistical analyses performed with IBM SPSS Statistics software at significance value p < 0.05. Micro-roughness values increased thermocycling, but kept under clinically accepted values. characteristics ceramics not significantly modified thermocycling. Values glazed samples became closer those polished ones, hydrothermal aging, even if differences insignificant. decreased microhardness, mainly samples. This could be consequence glaze removal during which means that glazes provide surface protection time.