Durability of teeth whitening

The following applies to all the methods listed above: The whitening of the teeth does not last forever, but often for several years. The durability of the result depends largely on the quality and quantity of oral hygiene, the individual consumption habits (especially of coffee, tobacco and tea) as well as on the fact whether superficial discolourations are regularly removed in the course of a professional dental cleaning. 

As soon as the whitened teeth darken in whole or in part, the bleaching can be repeated to achieve a new whitening. The bleaching trays that were made for the first application can usually be reused.