Root canal therapy is saving a tooth that has infection or a compromised pulp (inner chamber of the teeth which contains the blood vessels and nerves). The process involves removing the diseased tissue, stopping the spread of infection and restoring the healthy portion of the tooth.
If a tooth becomes infected, the infection can spread to the roots of the tooth, causing problems for the tooth. Similar problems can occur if a traumatic injury has occurred to the tooth. A restored tooth after root canal therapy can have a long life expectancy. Typically for there is little to no pain or discomfort for root canal therapy.