His smile teeth whitening
Teeth whitening lightens some natural tooth discoloration by using a peroxide gel, but it does not change the color of fillings, crowns, veneers, or.
The short answer
Natural teeth darken when pigment molecules enter enamel and dentine from foods, drinks, tobacco, ageing, trauma, or some medicines. Peroxide breaks down many of these molecules, while intrinsic discoloration, tartar, decay, and restorations may need different treatment.

What is the direct answer?
What does this question mean?
Have the teeth and gums checked before whitening, then use a dentist-provided or correctly labelled product as directed. Maintain the result with regular brushing, interdental cleaning, and attention to staining habits, while avoiding excess gel or extended treatment.
What can you do next?
Seek dental advice for persistent sensitivity, gum burning, uneven color, a dark single tooth, untreated decay, or visible restorations that do not match after whitening. A dentist can distinguish stain from disease and discuss alternatives such as cleaning, restorative treatment, or cosmetic procedures.
When should you seek dental care?
Ask what is causing the discoloration, which teeth will respond, how existing restorations will look afterward, and how sensitivity will be managed.
What should you ask the dentist?
Whitening acts mainly on natural tooth structure.
Frequently asked questions
What happens during the dental examination?
The clinician reviews your history, examines the relevant teeth and tissues, and uses focused tests or imaging when needed.
