Burst whitening strips before and after
Whitening strips can lighten some surface and internal stains, but results vary with enamel, dentine, fillings, and the product used.
The short answer
Whitening strips may lighten natural teeth, but the before-and-after result depends on the type of stain, the peroxide formulation, and whether restorations are present. They cannot bleach fillings, crowns, veneers, or bonding in the same way as enamel.
What is the direct answer?
What does this question mean?
A strip carries a whitening gel against the front tooth surfaces. Peroxide can break down some stain molecules within enamel and dentine, while surface deposits may also respond to cleaning; deep medication-related or developmental discoloration may respond less.
What can you do next?
Check the instructions, keep gel off the gums, and stop if marked sensitivity or gum irritation develops. Have visible cavities, cracked enamel, leaking fillings, and uneven dark areas assessed before whitening so the cause is not hidden by a cosmetic treatment.
When should you seek dental care?
See a dentist when one tooth is grey, a stain is confined to a filling, or whitening causes sharp pain that continues after the product is stopped. Dental assessment is also appropriate when gum disease, decay, or exposed root surfaces are present.
What should you ask the dentist?
Ask which stains are likely to respond, whether your restorations will need colour matching, and whether a custom tray or in-office method is more suitable. Ask how sensitivity would be managed and what shade change is realistic for your teeth.
Frequently asked questions
Will strips whiten a crown?
No. A crown keeps its manufactured shade, so a dentist may need to plan colour matching after natural teeth are treated.
Why are my teeth still uneven after strips?
Different teeth may contain different stains, enamel thicknesses, or restorations, so they do not necessarily lighten evenly.