With the appropriate care, your teeth that have had endodontic treatment will last as long as other natural teeth. Yet, a tooth that has received endodontic treatment may fail to heal or pain may continue to exist. Sometimes, the pain may occur months or years after treatment. If so, Dr. McKinley, Jr. may need to perform Endodontic Retreatment. Once retreatment has been selected as a solution to your problem, the doctor will remove the restorative material to reopen your tooth and gain access to the root canal filling material inside.