Effects of Surface Finishing Methods, Zirconia Brands, and Bleaching Techniques on Color Change and Translucency of Monolithic Zirconia Restorations: A Comparative Study

Background: This study aimed to investigate the effects of different surface finishing methods (glaze and polishing), various zirconia brands (multilayer, ultra translucent, and super translucent), and different bleaching methods (office and home bleaching) on the color change, whiteness change, and translucency parameters of different monolithic zirconia. Methods: The researchers prepared 180 samples using three types of monolithic zirconia blocks with different translucent properties. The samples were divided into groups based on surface treatments (glaze and polishing) and bleaching methods (office and home bleaching). Color measurements were taken before and after the surface treatments and bleaching procedures using a spectrophotometer. The color change (ΔE00), whiteness change (ΔWI), and translucency parameters were calculated based on the measurements. Results: The statistical analysis revealed that zirconia brands, surface finishing methods, and bleaching procedures significantly affected the color change, whiteness change, and translucency parameters of the monolithic zirconia samples. In terms of bleaching methods, the ∆E00 and ∆WI values of office bleaching were significantly higher than home bleaching in the MLG group (p0.05). Conclusion: The results of the study indicate that zirconia brands, surface finishing methods, and bleaching procedures have an impact on the color change, whiteness change, and translucency parameters of monolithic zirconia restorations. The study suggests that careful consideration should be given to the selection of zirconia brands, surface treatments, and bleaching methods to achieve optimal aesthetic outcomes in prosthetic restorations.