Carbamide peroxide teeth whitening kit
A carbamide peroxide whitening kit uses a peroxide gel in a tray to lighten tooth stains, with fit and concentration guiding its use.
How does a carbamide peroxide whitening kit work?
A carbamide peroxide whitening kit uses a peroxide gel in a tray to lighten tooth stains, with fit and concentration guiding its use.
What happens when carbamide peroxide breaks down?
Carbamide peroxide breaks down into hydrogen peroxide and urea. The peroxide moves through enamel and dentine and oxidizes some stain molecules, while fillings, crowns, and veneers do not change shade.
How should you use the whitening gel safely?
Use only the gel amount and wear time supplied for the tray, keeping gel off the gums and swallowing as little as possible. A dental examination should check cavities, cracked enamel, gum inflammation, and existing restorations before whitening.
When should whitening irritation or pain be checked?
Stop and seek dental advice if you develop marked gum irritation, persistent tooth pain, or sensitivity that does not settle after the course. Dental assessment is especially important with untreated decay, enamel defects, or a history of strong sensitivity.
What should you ask about stains, trays, and restorations?
Ask which stains are likely to respond, whether the tray seals evenly, and how the gel may affect your fillings or crowns. Ask how to manage sensitivity and whether another treatment is more suitable.
Frequently asked questions
Can a whitening kit change every tooth?
It acts on natural tooth structure and does not recolor fillings, crowns, or veneers.
Why do my teeth feel sensitive after whitening?
Peroxide can temporarily irritate the pulp or expose fluid movement through dentine, producing sensitivity.
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.