Endodontics is the area of dentistry dealing with the prevention, diagnosis, and treatment of disorders of the dental pulp.
Endodontic therapy (root canal) is a treatment modality that will save diseased or injured teeth. The alternative to endodontics is extraction. Typically, a severely decayed tooth or a tooth with a large filling will begin to ache. The pain might be intermittent at first and over time progress to a constant dull throbbing pain or a severe ache that might be felt on all the teeth on the affected side. Sometimes there is no pain and an abscess might be discovered on a routine x-ray.