RESUMEN
In this study, the effects of two commercial bleaching gels on color and surface roughness of hybrid composite, compomer, and hybrid ionomer respectively were evaluated. Test specimens were exposed to both bleaching gels for 312 hours at 37°C at 100% relative humidity. Color change value and surface roughness values were calculated before and after exposure to the gels. All the specimens of tested materials showed change in color. The hybrid ionomer had the highest mean change in color and the compomer showed the lowest mean change in color with both gels and this difference was significant. All specimens of tested materials showed a high mean percentage of change in surface roughness, while the compomer showed the lowest value and this difference was significant. Nupro Gold gel showed a significant increase in mean percentage of change in surface roughness. There was no correlation between change in color and change in surface roughness