Crest professional whitening strips
Whitening strips use peroxide to lighten some surface and internal tooth stains, but results depend on the stain and the product directions.
The short answer
Whitening strips use peroxide to lighten some surface and internal tooth stains, but results depend on the stain and the product directions. They cannot change the colour of fillings, crowns, veneers, or other dental restorations.
What is the direct answer?
What does this question mean?
A whitening strip is a flexible carrier coated with a peroxide gel, commonly hydrogen peroxide or carbamide peroxide. The gel oxidizes stain molecules within enamel and dentin while the strip holds it against the tooth surface. Uneven contact can produce uneven lightening.
What can you do next?
Read the package directions, apply strips only to the intended teeth, and remove them for eating and drinking. Do not extend wear time or frequency to chase a faster result. A dental examination should come first when there is decay, gum disease, exposed roots, or strong sensitivity.
When should you seek dental care?
Ask for a dental assessment if whitening causes sharp pain, gum irritation, or symptoms that do not settle after stopping. A dentist should also assess darkening of one tooth, a broken tooth, cavities, or a restoration that no longer matches.
What should you ask the dentist?
Ask what type of stain you have, whether your teeth and gums are ready for whitening, and how existing restorations will look afterward. Ask about a custom tray or in-office option if strips do not reach the desired shade evenly.
Frequently asked questions
Can whitening strips whiten crowns?
No. The natural tooth may lighten while a crown keeps its existing shade.
Why do strips make my gums sting?
Gel may contact the gum or the tissue may be irritated by a poorly fitted strip or excessive use.