Smile bright teeth whitening
Teeth whitening lightens stains on enamel and dentin; a dentist first checks for decay, gum disease, restorations, and sensitivity.
The short answer
Professional teeth whitening uses peroxide gel to break down stain molecules, while a dentist checks that your teeth and gums are healthy first.
Which stains can teeth whitening target?
Whitening can target surface stains from tea, coffee, tobacco, or coloured foods and deeper discoloration within enamel or dentin. A brightening product may be a dentist-supervised tray, an in-office application, or a lower-strength home product, and the concentration and contact time differ.
What should you arrange before whitening your teeth?
Arrange an examination before whitening, especially if you have toothache, gum bleeding, cracks, exposed roots, or untreated cavities. The dentist may clean deposits, treat disease, record the starting shade, and provide fitted trays or apply gel with protection for the gums.
When should tooth or gum symptoms be assessed?
Seek dental care before using whitening if a tooth is painful, darkening on its own, sensitive to temperature, or surrounded by swollen or bleeding gums. Stop the product and contact a dentist if strong sensitivity, gum burning, or persistent irritation develops.
What is causing the colour change in your tooth?
Ask whether the colour change comes from surface stain, enamel, dentin, trauma, or a filling, and which treatment fits that cause. Also ask how existing restorations will match, how to manage sensitivity, and whether you need treatment before whitening.
Frequently asked questions
Can whitening remove every dark tooth?
No. A single dark tooth may have internal discoloration or a damaged pulp and needs an examination before whitening.
Why do my teeth feel sensitive after whitening?
Peroxide can temporarily irritate the tooth nerve through enamel and dentin; a dentist can adjust concentration, exposure, or timing.
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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.