Endodontists specialize in root canal therapy. This means they are concerned with the morphology, physiology, and pathology of the human dental pulp and periradicular tissues. This includes the prevention and treatment of diseases and injuries to the pulp as well as other periradicular conditions. Inflammation and pain in the tooth’s pulp can be quite severe. Getting relief from the pain and controlling an infection in the pulp tissue may require root canal therapy, or another treatment of the tooth’s soft tissue. These procedures, along with many others, are frequently performed by endodontists.
For more general information about Endodontists please see: https://en.wikipedia.org/wiki/Endodontics