White teeth laser
Laser or light may activate a peroxide whitening gel in a clinic, but the result depends mainly on the gel, tooth type, and the cause of discoloration.
The short answer
Laser teeth whitening usually means a dentist places peroxide gel on the teeth and may use a light or laser as part of the protocol; it cannot whiten fillings, crowns, or veneers.
What is the direct answer?
What does this question mean?
Whitening works when peroxide molecules diffuse into enamel and dentine and break down some coloured organic molecules. A light device may be used with a gel, but intrinsic stains, restorations, enamel defects, and exposed roots respond differently.
What can you do next?
Have the dentist examine decay, cracks, gum recession, sensitivity, and existing restorations before whitening. Ask whether custom trays, an in-office gel, or treating the underlying stain is more suitable, and protect the gums during any peroxide application.
When should you seek dental care?
Get dental care before whitening if teeth hurt, gums bleed, there are untreated cavities, or a single tooth has darkened. A dark tooth can reflect pulp injury and should not be masked without diagnosis.
What should you ask the dentist?
Ask what is causing the discoloration, which surfaces will change, whether existing restorations will need replacement for colour matching, and how sensitivity will be managed.
Frequently asked questions
Does laser whitening whiten every stain?
No. Some deep or developmental stains respond incompletely and may need another treatment approach.
Why can whitening cause sensitivity?
Peroxide can pass through enamel and dentine and temporarily irritate the pulp, especially when teeth already have exposed dentine or cracks.