Bright and white teeth whitening
Teeth whitening lightens natural tooth colour by using peroxide to break down stains within enamel and dentine.
The short answer
Teeth whitening uses a peroxide-based gel to break down some stains on natural enamel and dentine, making teeth appear lighter. It does not whiten fillings, crowns, veneers, or other tooth-coloured restorations.
What is the direct answer?
What does this question mean?
Surface stains can collect from coffee, tea, tobacco, or coloured foods, while internal colour changes can develop as teeth age or after certain dental events. A dentist first checks for decay, gum inflammation, cracks, and restorations before selecting a whitening method.
What can you do next?
Have the teeth and gums examined before using a whitening product, and follow the supplied application time rather than leaving gel on longer. Stop and contact the dental team if marked sensitivity, gum burning, or uneven colour develops.
When should you seek dental care?
Arrange an examination before whitening if you have toothache, untreated cavities, gum bleeding, worn enamel, or a broken restoration. Seek care for pain that persists after whitening or for a chemical burn on the gums.
What should you ask the dentist?
Ask which stains are likely to respond, whether existing restorations will need colour matching, and which concentration and delivery method fit your teeth. Ask how sensitivity will be managed and when replacement restorations should be considered.
Frequently asked questions
Will whitening make every tooth the same colour?
Not always, because restorations and some internal stains respond differently from natural enamel.
Can I whiten teeth with cavities?
Untreated cavities can expose sensitive inner tooth structure, so they should be assessed before whitening.