Read the active ingredient, directions, duration and warnings; pick a format you can use exactly as labeled. Whitening products do not change crowns or fillings, and results and sensitivity vary, so discuss concerns with a dentist.
Start with the label. Check the active ingredient, how long each application stays on, total treatment duration, storage, age limits and warnings. An easy-to-use format is only useful if you can follow it without extending the schedule or using extra product.
Compare the format
| Format | Check |
|---|---|
| Whitening strip | Coverage, adhesion, application time and instructions for overlapping teeth |
| Tray kit | Tray fit, gel amount, cleaning and storage directions |
| Whitening toothpaste | Whether the product is intended for stain removal or another claim |
Sensitivity, gum irritation and results differ among people. Do not exceed the product’s directions or combine products unless a dentist advises it. Stop use and seek dental advice if pain or irritation continues.
Whitening does not change the color of crowns, veneers, fillings or other restorations. The ADA recommends talking with a dentist before whitening if you have dental work, untreated oral-health issues or questions about a product. For the choice between application formats, read whitening strips vs trays.
Sources: ADA teeth whitening.
Common questions
Are whitening strips or trays better?
Both formats have different application and fit. Compare label directions, use time and ingredients, and see the strip-vs-tray comparison.
Can whitening cause tooth sensitivity?
Sensitivity can occur and varies by person and product. Follow the package directions and stop or ask a dentist if irritation or pain persists.
Do whitening products change crowns or fillings?
No. Whitening products do not change the color of restorations; consult a dentist about visible color differences.