As much as some dread a root canal, it is a necessary procedure to save a tooth. The tooth is infected at its root and the diseased pulp is causing pain and likely swelling. The infection won’t go away by itself. It must be cleaned out and sealed so the tooth can remain intact. A crown will go over the tooth to protect it from decay.
Root planing is the second part of the deep cleaning procedure. The hygienist smooths out tooth roots below the gumline, being certain to remove bacteria from plaque and tartar buildup. Smoothing out the roots allows the gums to reattach to the teeth.

Prevents infection from returning.