Internal bleaching is a technique that is used to whiten the appearance of a tooth that has had endodontic treatment and is darker than the surrounding teeth. Unlike over-the-counter solutions that are used to whiten teeth, internal bleaching requires invasive action and is conducted under the direction of a dentist. 

The process for an internal bleaching involves the insertion of a chemical oxidizing agent into the tooth. This is accomplished by making an access opening on the tongue side of an anterior tooth or the biting surface of a posterior tooth. The agent is left in the tooth for up to two weeks and may be replaced with more chemicals until the tooth achieves the level of whiteness desired. Once the series of treatments is completed, the access is restored with a permanent restoration, ensuring that foreign matter will not be able to invade the tooth and cause other problems. 
Not everyone is a candidate for internal bleaching. Dr. Lewis will evaluate the degree of staining and discoloration that is present and determine if the procedure is indicated.