The teeth can be affected by many factors such as coffee, snuff, age, etc. Teeth whitening is a clinical procedure that lightens the color of one or more teeth, applying a chemical agent and trying not to alter the basic structure of the enamel. Teeth whitening is a method by which we can lighten the color of your tooth enamel or recover the natural white that may have been lost for many reasons. You can post multiple reasons why teeth darken and need to be clarified by teeth whitening: the consumption of snuff, coffee, tea, certain medications, some mouthwashes, etc. Because having teeth bright and white teeth is a requirement to enjoy light and show attractive smile; tooth whitening has become one of the currently most requested treatments. In the case of vital teeth (with nerve) we opted for the ZOOM teeth whitening UV 2, which will take place in the clinic. The duration of the session will be between 40 and 60 minutes. 2 or 3 sessions may be necessary. In all cases in which it is possible to whiten teeth, we get a color change that will improve the look on your face. This improvement will go off seeing as the months pass and teeth have been back in touch with coffee, tea, snuff, wine, etc. therefore, a dental re-whitening maintenance after approximately 2 or 3 years will be necessary, according to consumption agents just discussed.