Opalescence hydrogen peroxide
Opalescence uses peroxide to break down stain molecules, with the formulation chosen for your teeth and gums.
The short answer
Opalescence whitening uses peroxide chemistry to break down stain molecules, and the right formulation depends on your teeth, gums, sensitivity, and existing restorations.
How does hydrogen peroxide break down colour?
Hydrogen peroxide releases reactive oxygen that alters coloured organic molecules in enamel and dentin. Carbamide peroxide breaks down into hydrogen peroxide and urea. Neither agent whitens fillings, crowns, veneers, or implant restorations.
How can you use whitening gel more safely?
Check the product concentration and instructions, keep gel away from the gums, and do not whiten over untreated decay, cracks, exposed roots, or active gum inflammation. Stop and arrange review for significant sensitivity or gum irritation.
When should teeth be assessed before whitening?
Obtain dental assessment before whitening if one tooth is dark, teeth hurt, gums bleed, or you have extensive restorations. Persistent burning, ulcers, or sensitivity needs review.
Which Opalescence option suits your dental needs?
Ask which Opalescence formulation and tray design fit your teeth, how restorations will match afterward, and how existing sensitivity or gum disease changes the plan.
Frequently asked questions
Can this symptom have more than one cause?
Hydrogen peroxide releases reactive oxygen that alters coloured organic molecules in enamel and dentin. Carbamide peroxide breaks down into hydrogen peroxide and urea. Neither agent whitens fillings, crowns, veneers, or implant restorations.
What should you check before using whitening gel?
Check the product concentration and instructions, keep gel away from the gums, and do not whiten over untreated decay, cracks, exposed roots, or active gum inflammation. Stop and arrange review for significant sensitivity or gum irritation.
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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.