Tooth-Colored Restorations Tooth-colored restorations (fillings) include composite resin restorations, ceramic inlays, and ceramic onlays. Depending on the size of the restoration, your dentist will select the most appropriate restoration for your teeth. Tooth-colored restorations are now commonly used to replace black amalgam restorations since since they may cause mucosal discoloration and some people are worried about the mercury level in amalgam.