Tooth Appearance and Restorative Treatments
Teeth Whitening
Teeth whitening is a chemical application that aims to lighten the colour of the natural tooth tissue. Scaling or polishing removes surface stains and deposits; it is not the same procedure.
Medical review: Dr. Taylan Akça. Last updated: Aug. 29, 2026.
In-office and home
In-office whitening is carried out at the clinic. The home method uses custom trays and a product/protocol determined by the clinician. In some cases the two methods can be combined.
Do restorations whiten?
The colour of restorations such as fillings, laminates and crowns does not change with whitening. If there is an existing restoration in the front region, re-assessment after the procedure may be needed for harmony with the new colour.
Frequently asked questions
Is teeth whitening harmful?
Whitening carried out with a suitable product and under the supervision of a clinician is generally considered safe; temporary sensitivity or gum irritation may be seen.
Does it cause sensitivity?
Temporary sensitivity can be common. The product concentration, the application time and individual sensitivity have an effect.
How long does it last?
Diet, smoking, oral hygiene and the starting colour affect the result. Discolouration can recur over time.
Does every tooth whiten to the same degree?
No. The type of discolouration matters. Some grey or deep colour changes can respond more slowly.
Treatment duration
With the home method, application with custom trays generally takes a few evenings; the in-office method is carried out at the clinic. The two methods can be combined in some cases. How long it lasts varies with diet, smoking and oral hygiene.
When it may not be suitable
The colour of restorations such as fillings, laminates and crowns does not change with whitening. Temporary sensitivity or gum irritation may be seen; the application should be carried out under the supervision of a clinician.