Root canal or endodontic treatment is necessary when the pulp becomes inflamed or infected. The inflammation or infection can have a variety of causes: deep decay, repeated dental procedures on the tooth, severe toothache upon chewing, prolonged sensitivity/pain, faulty crowns, or a crack or chip in the tooth. In addition, trauma to a tooth may cause pulp damage even if the tooth has no visible chips or cracks. If pulp inflammation or infection is left untreated, it can cause pain or lead to an abscess.
During root canal or endodontic treatment, the inflamed or infected pulp is removed and the inside of the tooth is carefully cleaned and disinfected, then filled and sealed with a rubber-like material called gutta-percha. Afterwards, the tooth is restored with a crown or filling for protection.
Endodontic treatment helps you to save the tooth, eliminate the pain and infection, so you can continue eating the foods you love. This treatment can be done in single visit, but most of cases need multiple-visit for better result. This treatment has more than a 90% success rate, but not every infected / non-vital tooth is indicated to be treated. The successful rate also depends to the case, like the remaining tooth structure, size of the infection/damage and final dental restoration.