If a tooth is damaged by decay or injury, the canals inside the root of the tooth may become infected. If the infection is not treated, it can lead to severe pain, abscess and tooth loss. Fortunately, the infection can be removed from the tooth and and the tooth can be restored to normal function. This treatment is also known as a root canal. Root canal treatment is one of the most successful of all dental procedures and enables you to keep your teeth for your lifetime.