Crest 3d white strips before after
Whitening strips can lighten some natural tooth stains, but the result depends on the starting shade, stain type, fit, and use instructions.
The short answer
Whitening strips are plastic films coated with peroxide gel that contact the front surfaces of natural teeth.
Why do peroxide strips leave fillings and veneers unchanged?
Peroxide breaks down stain molecules, while fillings, crowns, veneers, and bonding retain their original shade.
How can you use whitening strips more safely at home?
Follow the label, keep gel off the gums, and stop if marked sensitivity or chemical irritation develops.
When should you see a dentist before using whitening strips?
See a dentist before whitening with cavities, cracks, gum recession, inflammation, or visible restorations.
What should you ask about whitening and your restorations?
Ask whether the colour is surface or internal and whether restorations will match afterward.
Frequently asked questions
What should I do first?
Follow the label, keep gel off the gums, and stop if marked sensitivity or chemical irritation develops.
When is examination needed?
See a dentist before whitening with cavities, cracks, gum recession, inflammation, or visible restorations.
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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.