His smile teeth whitening
Teeth whitening lightens some natural tooth discoloration by using a peroxide gel, but it does not change the color of fillings, crowns, veneers, or.
The short answer
Natural teeth darken when pigment molecules enter enamel and dentine from foods, drinks, tobacco, ageing, trauma, or some medicines. Peroxide breaks down many of these molecules, while intrinsic discoloration, tartar, decay, and restorations may need different treatment.
What should you check before using a whitening product?
Have the teeth and gums checked before whitening, then use a dentist-provided or correctly labelled product as directed. Maintain the result with regular brushing, interdental cleaning, and attention to staining habits, while avoiding excess gel or extended treatment.
When should discolouration or sensitivity receive dental advice?
Seek dental advice for persistent sensitivity, gum burning, uneven color, a dark single tooth, untreated decay, or visible restorations that do not match after whitening. A dentist can distinguish stain from disease and discuss alternatives such as cleaning, restorative treatment, or cosmetic procedures.
What should you ask about the cause of tooth discolouration?
Ask what is causing the discoloration, which teeth will respond, how existing restorations will look afterward, and how sensitivity will be managed.
Which tooth surfaces can whitening actually change?
Whitening acts mainly on natural tooth structure.
Frequently asked questions
What happens during the dental examination?
The clinician reviews your history, examines the relevant teeth and tissues, and uses focused tests or imaging when needed.
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Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.