A root canal is a therapy done to remove infected nerve tissue, typically followed by a crown to renew the function of a tooth and alleviate any pain. Below is a brief walkthrough explaining what a root canals is:
A root canal has to be performed if the dental nerve (Latin: Pulpa) has died and/or is infected. The objective of a root canal is to completely remove the destroyed tissue (which may also be infected with bacteria in some cases) from the interior of the tooth, so that the infection is prevented from spreading to the bone.