The final color of the teeth is mainly determined by dentin, the inner layer of the tooth. To achieve a meaningful change in tooth color, whitening agents must be able to penetrate the enamel and act within the dentin.
According to European Union regulations, such whitening products are available exclusively through dentists and are safely used under professional supervision.

It is not possible to predict in advance exactly how white your teeth will become. What is certain is that they will maintain their natural color gradation.
After whitening, teeth are usually slightly darker near the gumline compared to the rest of the tooth. If you desire perfectly white and uniform teeth, whitening may not be the ideal solution, and veneers may be considered instead.

Yes. Teeth whitening provides a very natural result, as it does not alter the shape of the teeth and preserves their natural color transitions.

No. However, it is recommended to avoid smoking for 30–60 minutes after the application of the whitening agent, so as not to compromise the result.

The combination of in-office whitening and at-home whitening is considered the most effective approach, as it can achieve the desired result in a shorter period of time.
However, it is more costly, as it involves multiple techniques and materials. Excellent results can also be achieved with at-home whitening alone, using custom-made trays, which is a more affordable option and allows for future maintenance of the result.

Initially, the teeth and gums are examined to ensure they are healthy. Conditions such as cavities, gingivitis, or old fillings may need to be treated before whitening.
Impressions are then taken, and custom-made trays are fabricated. You place the whitening gel provided by the dentist into the trays, which are typically worn during sleep for 10–15 nights, or longer if needed.

In-office whitening involves the direct application of a whitening agent to the teeth, with or without the use of a special light (e.g., Philips ZOOM).
This technique is preferred by patients who want fast results without using trays. The procedure usually lasts less than one hour and can be combined with at-home whitening to prolong the results.

If there are active dental issues, such as cavities or the need for fillings, these must be addressed before whitening, as the treatment is applied only to healthy teeth.
If, however, the teeth are healthy and you wish to replace old fillings for aesthetic reasons, this can be done at least 15 days after the completion of whitening.

Teeth whitening is not permitted for individuals under the age of 18. It is also not recommended for pregnant women or women who are breastfeeding, as there is insufficient evidence regarding its effects on the fetus or infant.

When whitening is performed on healthy teeth, using approved materials and under the supervision of a dentist, it does not pose a risk to dental or general health.
In some cases, mild and temporary sensitivity may occur, which resolves quickly. It should be noted that porcelain restorations and white fillings do not change color during whitening.

Teeth whitening is a semi-permanent method of improving tooth color. Teeth remain significantly whiter for a long period compared to their pre-treatment shade.
To maintain the result, whitening can be repeated once a year using custom-made trays, applying the whitening gel for 1–2 nights.