In this particular clinical case we have a 39-year-old patient with a yellowish internal dental staining in the upper left central incisor caused by a root canal 8 years ago.
After the diagnosis, the patient is advised to have the tooth re-endodontic and an internal whitening treatment. The treatment consisted of the application of an internal bleaching agent that was replaced every 4 days for a total of 3 sessions. The final result of the internal tooth whitening allowed to achieve a color identical to the adjacent tooth.
It should be noted that dark teeth are an increasingly frequent consultation in dental clinics. Sometimes, dental darkening is localized, which generates a greater visibility of the problem when smiling or talking to other people. They can be of external or internal origin.
Localized internal darkening may be caused by materials used in a previous root canal or necrosis of the pulp tissues inside the tooth. Its solution requires a more sophisticated treatment than external dental staining, but is equally effective.
This type of non-vital tooth whitening, as the endodontically treated tooth is usually called, is similar to external whitening: it requires the application of a whitening gel. Internal tooth staining is treated clinically by means of chemical bleaching agents that are introduced inside the tooth, in the pulp cavity of the tooth. The most commonly used bleaching agents are hydrogen peroxide and carbamide peroxide.
This bleaching agent needs to be replaced every 3-5 days until the desired bleaching effect is achieved.