Professional white crest
Professional Crest whitening uses peroxide to lighten natural teeth, but suitability depends on gum health, enamel, sensitivity, and existing restorations.
The short answer
Professional Crest whitening can lighten natural tooth colour when used as directed, but it cannot whiten fillings, crowns, veneers, or damaged enamel.
How does peroxide break down tooth stains?
Crest whitening products use peroxide-based chemistry to break down some stain molecules within tooth structure. The result depends on the type of discoloration and the condition of the enamel and gums.
How can you use Crest whitening more safely?
Read the product directions, keep gel or strips off the gums, use a sensitivity toothpaste if appropriate, and stop if you develop significant irritation. A dental examination is useful before whitening when you have decay, cracks, gum disease, or unexplained colour change.
When should tooth discolouration be checked first?
Seek dental care for pain, cavities, bleeding gums, enamel defects, or a single darkening tooth before whitening. Persistent sensitivity or gum burning also needs review.
What should you ask about whitening your enamel and gums?
Ask whether the discoloration is surface stain, internal tooth colour, decay, fluorosis, trauma, or a restoration, and whether whitening is suitable for your enamel and gums.
Frequently asked questions
Can Crest whitening fix a grey tooth?
A grey tooth can have an internal cause such as pulp injury, so it should be examined before whitening.
Why did my gums turn white?
Whitening material touching the gum can temporarily irritate it. Follow the product instructions and contact a clinician if it persists.
Can whitening repair enamel damage?
No. Whitening changes colour; it does not rebuild lost enamel or seal a defect.
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.