What to know
Whitening can lighten natural teeth, but it will not change the color of fillings, crowns or veneers. A dentist can check whether decay, gum problems or another cause of discoloration needs attention first.
Questions for the dentist
Ask about expected results, sensitivity and how an existing restoration may look afterward. More treatment is not always better. Avoid promises of a guaranteed shade or permanently white teeth.
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Sources checked October 23, 2026. This is general education compiled from the linked sources, not a diagnosis or individual treatment recommendation. These pages have not been independently reviewed by a clinician.