Crest professional white strips from dentist
Dentist-dispensed whitening strips use peroxide, but suitability depends on enamel, gums, sensitivity, and restorations.
The short answer
Dentist-dispensed whitening strips can lighten natural teeth with peroxide, but a dentist should first check enamel, gums, sensitivity, and restorations.

What is the direct answer?
What does this question mean?
The strip holds a peroxide gel against the facial surfaces of teeth. The active molecules pass into enamel and dentine and break down some stain compounds; crowns, fillings, and veneers keep their original shade.
What can you do next?
A dentist examines the teeth, treats active disease, records the starting shade, and explains wear time and contact with the gingiva. Follow the supplied schedule and avoid extending applications to chase a faster result.
When should you seek dental care?
Arrange review for sharp sensitivity, gum burns, pain, cracks, untreated decay, or a dark tooth that differs from its neighbours. The dentist may need to diagnose the tooth before any whitening.
What should you ask the dentist?
Ask what peroxide concentration and wear schedule are planned, how sensitivity will be managed, and whether restorations will need replacement for shade matching.
Frequently asked questions
Are dentist-supplied strips the same as any shop strip?
The formulation, concentration, fit, and instructions can differ, so follow the specific product directions given to you.
Can whitening fix a grey tooth?
A grey tooth may reflect internal change or trauma and needs diagnosis before a whitening plan is selected.
