Crest whitestrips premium
Whitening strips use a peroxide gel to oxidize stain molecules on the enamel surface and within enamel.
The short answer
Whitening strips use a peroxide gel to oxidize stain molecules on the enamel surface and within enamel. Results and irritation depend on the peroxide formulation, contact time, tooth structure, and existing dental work.
Why will fillings and crowns not change colour with strips?
The strip holds gel against the visible surfaces of the teeth, but it does not change the color of fillings, crowns, veneers, or bonding. Uneven color can appear when restorations or deeper dentin discoloration are present.
How can you use whitening strips more safely at home?
Follow the product directions, keep gel off the gums, and stop if burning or marked sensitivity develops. A dental cleaning may be needed first when plaque, calculus, or gum inflammation is present.
When should tooth sensitivity after whitening be checked?
Seek dental care for persistent sensitivity, gum injury, a single dark tooth, cavities, cracks, or whitening that becomes patchy.
Which whitening method suits your teeth and existing dental work?
Ask whether your enamel, gums, fillings, and existing restorations are suitable for peroxide whitening and which method fits the type of stain.
Frequently asked questions
Can this be diagnosed from the symptom alone?
No. The examination and the pattern of symptoms determine which causes need attention.
What information should I bring?
Bring the product or appliance, a list of medicines, and when the symptom or concern began.
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.