Root canal therapy involves the treatment of the nerve (called the 'pulp') inside the tooth.
In most cases the nerve must be removed, the canals are then thoroughly cleaned and filled with a material that seals off the root canal from bone supporting the tooth root. Root canal therapy can save your tooth and avoid extraction.
Common factors that may require root canal treatment are inflammation or infection of the pulp due to tooth decay, broken fillings, bacterial leakage of old crown or filling, dental trauma, severe gum disease. When a tooth has been infected, bacteria can dissipate through the bloodstream and result in localized swelling, pain, abscess formation and fever.