When you have your teeth paled, it doesn’t change the colour of any former dental work. That’s because crowns and veneers are made of porcelain, which can’t be changed. The same goes for demitasse paddings.But that doesn’t mean that you shouldn't do decolorizing if you have veneers, crowns, or a filling on a frontal tooth. In fact, the colour of the restorative work is presumably formerly lighter than the rest of your natural teeth, either due to stains or an incorrect colour match when it was placed. If you ’re concerned about your dental work standing out after a decolorizing procedure, you have the option to check the glass after each 15-nanosecond session to decide whether you want to stop. The dentist will consult with you before starting the treatment to answer all of your questions and discuss all possible options.