At the center of your tooth is pulp. Pulp is a collection of blood vessels that helps to build the surrounding tooth. Infection of the pulp can be caused by trauma to the tooth, deep caries which involves the blood supply to the tooth, cracks and chips, or repeated dental procedures. Symptoms of the infection can be identified as visible injury or swelling of the tooth, sensitivity /pain in that area. This simple treatment can save your natural teeth and prevent the need of dental implants or bridges , this statement holds good only if the tooth is restorable.