If your tooth has been sensitive to cold or hot, this sensitivity will usually disappear immediately after your appointment. Pain to chewing, tenderness to pressure, and swelling may take a little longer to resolve and possibly require antibiotics or pain medication. You should avoid chewing on the side that has undergone root canal therapy.
Many endodontic procedures are performed to relieve pain caused by pulpal infection or inflammation. With current techniques and anesthetics most patients experience no pain during the procedure. If there was pain or infection before the procedure the tooth may feel sensitive for a few days after treatment as the healing process occurs. Most of the time this discomfort can be controlled with either over-the-counter medications or prescriptions.
Endodontics, or root canal treatment, is necessary when the tooth pulp becomes infected or inflamed. The inflammation or infection can have several causes: deep decay, trauma, repeated dental procedures on a tooth, or a crack/fracture in the tooth. Sometimes a blow to the tooth will cause these changes but cannot be seen on the surface of the tooth. Some symptoms of a damaged pulp include pain, discoloration of the tooth, prolonged sensitivity to hot or cold, and swelling or tenderness in the gums near the tooth. Occasionally root canal treatment is necessary even when there are no symptoms.
The answer to this question depends on the technical difficulty in treating the root canal space. In general, root canal treatment takes between 45 and 90 minutes.