A root canal is a procedure that is used to save a tooth that has been weakened by decay or infection. A deep cavity or a severe crack in the tooth may cause this. The tooth can need to be extracted if the damage is too serious. A root canal procedure involves drilling into the infection, cleaning it, and sealing it to avoid further decay. Your tooth's root can become contaminated to the point that you develop an abscess or feel swelling and excruciating pain. If a tooth becomes too ridden with disease, your overall health is compromised.