Do teeth whitening work

Dental whitening can lighten some natural tooth discolouration, but it cannot change the colour of fillings, crowns, veneers, or dentures.

Whitening products use peroxide to break down certain stains within enamel and dentin. Surface cleaning can remove deposits, while deeper or age-related colour changes may need a supervised whitening plan.

The result depends on the cause of the discolouration, tooth condition, product concentration and exposure, and whether restorations are present. Some stains respond poorly and may need bonding, veneers, or another treatment.

A dentist checks for decay, cracks, gum disease, exposed roots, and restorations before whitening. Use the recommended product exactly as directed, keep gel off the gums, and report significant sensitivity or irritation.

Maintain the result with daily plaque control, suitable stain management, and periodic dental review. Whitening does not replace treatment for disease.

Arrange an examination before whitening if teeth hurt, gums bleed, a tooth has darkened alone, or the colour change is new.

Seek prompt care for swelling, trauma, severe pain, or a dark tooth with symptoms because the cause may be inside the tooth.

Ask What caused the colour change? Which natural teeth and restorations will respond? What whitening method and sensitivity precautions fit my mouth?