How does a dentist whiten teeth
A dentist whitens teeth by assessing their cause of discoloration, protecting soft tissues, and applying a peroxide-based gel.
The short answer
A dentist whitens teeth by examining the enamel and gums, recording the starting shade, protecting soft tissues, and applying a peroxide-based whitening gel under controlled conditions. The gel oxidizes some discoloring molecules within natural tooth structure; fillings, crowns, and veneers keep their existing shade.
What is the direct answer?
What does this question mean?
The clinician first separates surface stain from intrinsic discoloration caused within enamel or dentine. Treatment may use an in-office gel, custom trays for home use, or both, depending on the examination and the desired change.
What can you do next?
The dentist cleans visible deposits, checks for decay and gum inflammation, places isolation or a gum barrier, applies the selected gel for planned cycles, and reassesses the shade. Follow the aftercare instructions and use trays only as prescribed.
When should you seek dental care?
Arrange an examination before whitening if you have tooth pain, cavities, cracks, gum disease, or marked sensitivity. Contact the clinic if pain or soft-tissue irritation persists after treatment.
What should you ask the dentist?
Ask what caused the discoloration, which gel and delivery method are planned, and how existing restorations will match afterward. Ask about sensitivity management and whether another treatment is more suitable for a single dark tooth.
Frequently asked questions
Does dental whitening remove fillings?
No. Whitening changes natural tooth colour, while a filling retains its manufactured shade.
Why can whitening feel sensitive?
The gel can temporarily irritate dentine or the tooth nerve, especially where enamel is thin or the root is exposed.