If you have restorations like crowns, veneers, or fillings, it's important to note that these materials will not respond to teeth whitening treatments in the same way as natural teeth.
Whitening products are designed to lighten the enamel. They won't affect the color of restorations, though. This could result in a mismatch between natural teeth and restorations.
It's always best to consult your dentist before teeth whitening to ensure a consistent and balanced smile. Depending on your unique situation, they can offer alternative solutions that will work for you.