Opalescence percentage
Opalescence gel strength varies by formulation and use, so the label and dentist determine the appropriate whitening plan.
The short answer
Opalescence is sold in different whitening formulations and peroxide strengths, so the appropriate strength depends on the product, tray design, wear instructions, and your oral health.
What is the direct answer?
What does this question mean?
Whitening strength refers to the concentration of an active peroxide compound in the gel. Carbamide peroxide breaks down into hydrogen peroxide and urea, while hydrogen peroxide acts more directly; both can irritate pulp-sensitive teeth or gingiva.
What can you do next?
Read the exact product name and active ingredient on the syringe, use only the supplied tray, and keep gel off the gums. Stop if burning or marked sensitivity develops, and avoid applying leftover gel outside its instructions.
When should you seek dental care?
Seek an examination before whitening if you have cavities, cracked teeth, gum recession, enamel erosion, or existing tooth pain. Contact a dentist for sensitivity that continues after stopping the gel or for a painful isolated tooth.
What should you ask the dentist?
Ask which formulation suits your enamel and restorations, how the tray should fit at the gumline, and whether desensitising treatment is needed first. Ask how to handle fillings or crowns that will not change colour.
Frequently asked questions
Does a higher strength always whiten better?
No. Results depend on the stain, exposure, fit, wear schedule, and tooth condition as well as gel strength.
Why can whitening hurt?
Peroxide can pass through enamel and temporarily irritate the pulp, while gel on the gums can irritate soft tissue.