Crest professional effects
Professional whitening products use peroxide to lighten natural tooth stains, with effects and irritation depending on concentration, contact time, and teeth.
The short answer
Professional whitening products that use peroxide can lighten stains on natural teeth, while the main clinical effects to discuss are colour change, temporary sensitivity, and possible gum irritation. They do not lighten fillings, crowns, or veneers.
What is the direct answer?
What does this question mean?
Peroxide penetrates enamel and dentine and reacts with coloured molecules. The result depends on whether the stain is on the surface or within the tooth, and intrinsic discolouration may need a different plan from coffee or tea staining.
What can you do next?
A dentist checks for decay, cracks, gum recession, and mismatched restorations before recommending a product or regimen. Follow the label or prescription exactly, use a well-fitting tray when supplied, and stop if the gums become sore.
When should you seek dental care?
Arrange an examination for severe or persistent sensitivity, white or burned-looking gum patches, uneven whitening, or a tooth that remains dark. A single dark tooth may need a pulp assessment rather than more whitening.
What should you ask the dentist?
Ask which stain is present, whether the product suits your enamel and gums, and which restorations will remain unchanged. Ask how to manage sensitivity and when to reassess the shade.
Frequently asked questions
Can whitening damage a filling?
Whitening does not bleach the filling, so the restoration may look different from the surrounding tooth afterward.
Why do my gums sting during whitening?
Gel may contact the gum, or the tissue may be sensitive; a clinician can check the fit and the product use.