Tooth whitening products selection and safety
Whitening products use peroxide or abrasives, and the right choice depends on stains, gums, teeth, and restorations.
The short answer
Tooth-whitening products use peroxide or abrasive ingredients to change or remove stains; the right choice depends on the teeth, gums, restorations, and cause of discoloration.
How do peroxide and abrasives remove different stains?
Peroxide can oxidize stains within enamel and dentine, while abrasives mainly remove surface deposits. Crowns, fillings, veneers, and bonding do not change shade with peroxide, so uneven color can result if restorations are present.
What should a dentist check before you whiten your teeth?
A dentist can check for decay, cracks, gum problems, enamel defects, and existing restorations before whitening. Follow the product directions, protect the gums from gel, and stop if sharp sensitivity or gum irritation develops.
When should you delay whitening and seek dental care?
Seek care before whitening if you have untreated decay, painful sensitivity, gum disease, or a persistent dark tooth. A dentist should assess a single gray, brown, or nonresponsive tooth because internal discoloration may need different treatment.
What should you ask about products, trays and sensitivity?
Ask which stains are external or internal, whether restorations will mismatch afterward, what peroxide concentration and tray fit are appropriate, and how sensitivity will be managed.
Frequently asked questions
Can this be diagnosed from appearance alone?
No. A dental examination may include focused tests or imaging to identify the cause.
What should I avoid doing at home?
Avoid squeezing, scraping, or applying unprescribed chemicals to the affected teeth or gums.
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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.