A root canal is the space within the root of a tooth. It is part of a naturally occurring space within a tooth that consists of the pulp chamber (within the coronal part of the tooth), the main canal(s), and more intricate anatomical branches that may connect the root canals to each other or to the surface of the root. If the pulp of a tooth is diseased or injured, the pulp tissue dies. If you don’t remove the pulp, you could lose your tooth. The root canal process is the removal of the pulp and the placement of a crown on the tooth to help make it stronger. A root canal is a relatively simple process causing little discomfort.