is a treatment to repair and save a badly damaged or infected tooth instead of removing it. The term "root canal"
comes from cleaning of the canals inside a tooth's root. Decades ago, root canal treatments often were painful.
A root canal is performed when the soft inner part
of a tooth, known as the pulp, is injured or becomes inflamed or infected.
The crown of the tooth — the part you can see above your gums — can remain intact even if the pulp is dead. Removing injured or infected pulp is the best way to preserve the structure of the tooth.