What's a root canal

The pulp and nerve in a tooth are removed and the tooth is sealed.

Root Canals: Process, Causes, Problems, Surgery, Recovery, and More

Thank you.

The canals contain the nerves and blood vessels, which lead to the pulp chamber. Any trauma or infection of the nerve will result in the need for a root canal. In short, just as JudyKayTee said. Common reasons for root canal therapy include; Tooth decay penetrating through the enamel and then the dentin in to the pulp, abscesses, or trauma.