In vitro comparison of the surface roughness of three nanohybrid resin composites before and after dry and wet polishing

Both dry and wet polishing were effective in reducing the surface roughness of Opallis and Tetric N-Ceram resin composites, whereas in Filtek Z250XT, a significant reduction was observed only with wet polishing. These findings suggest that the effectiveness of the polishing procedure may vary depending on the type of resin composite, which should be considered when selecting clinical finishing and polishing protocols to optimize the surface properties of restorative materials. <b>Key words:</b>Comparative study, Composite Resins, Dental materials, Dental polishing, Surface properties, surface roughness.