Impact of Different Bleaching Methods on Surface Roughness, Microhardness, and Tooth-Restoration Interface of Ormocer- and Methacrylate-based Restorative Systems

Both bleaching techniques have bad effects on surface roughness, microhardness, and tooth-restoration interface for both ormocer-based and methacrylate-based restorative systems. <b>Key words:</b>Surface roughness, Microhardness, Tooth-restoration interface, In-office vital bleaching, Ormocer-based composite, Methacarylate-based composite.