There are two options for dental whitening.
Dental whitening in the clinic: Attains a significant change in color in a very short period of time by applying a gel with a high concentration of hydrogen in the tooth enamel and a special protection for the gums. In most cases, it is applied in short intervals within an hour, and if necessary it could be repeated in several sessions until you obtain the results you want to, or be continued with a whitening system at home.
Dental whitening at home: The patient can take it and apply it at home. It is a special whitening kit with solutions of peroxide hydrogen in small quantities which also attains changes in color that are likely to preserve for a longer period of time.