Last Updated on January 19, 2026 by Dr. Lilian Jaime
Tooth whitening (or bleaching) is a simple, non-invasive dental treatment that changes the color of natural tooth enamel and is an ideal way to enhance the beauty of your smile.
Because having whiter teeth has now become the number one aesthetic concern for most patients, there are several ways to whiten teeth. The most popular method is using a home tooth-whitening system that can dramatically whiten teeth. Since tooth whitening only works on natural tooth enamel, it is important to evaluate the need to replace any old fillings, crowns, etc. Replacement of any restorations will be done after bleaching, so they will match the newly bleached teeth.
Tooth whitening is not permanent. A touch-up may be needed every several years, and more often if you smoke, drink coffee, tea, or wine.
Reasons for tooth whitening:
- Fluorosis (excessive fluoridation during tooth development).
- Normal wear of the outer tooth layer.
- Stained teeth due to medications (tetracycline, etc.).
- Yellow, brown-stained teeth.
This type of tooth whitening usually requires two visits. At the first appointment, impressions (molds) of your teeth will be made to fabricate custom, clear plastic trays.
At your second appointment, you will try on the trays for proper fit, and adjustments will be made if necessary. The trays are worn with a special whitening solution either twice a day for 30 minutes or overnight for a couple of weeks, depending on the degree of staining and desired level of whitening. It is normal to experience tooth sensitivity while whitening your teeth, but it will subside shortly after you stop bleaching.
