Root canal therapy is a dental procedure used to preserve a tooth which has been damaged resulting in exposure of the tooth root canal (the structure in the center of the tooth which provides access to blood and nervous supply to the tooth) to the outside. If a tooth is fractured, and the root canal is exposed, bacteria from the mouth can enter the canal and cause an infection and subsequent abscess. Teeth have one to 3 root canals depending on the structure and size of the tooth.

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