A root canal treatment is required when the blood or nerve supply of the tooth (the pulp) becomes infected as a result of decay or injury, leading to an abscess.

Root canal treatment involves removing the diseased tissue from inside your tooth and cleaning and sealing the root canal system with a filling to prevent further decay and infection. While a simple filling covering the root filling is sufficient on most occasions to restore function, a crown may be required where a significant tooth loss has taken place.