Please see root canal forum and research root canals. It's best to get that thing out of you from all I've read. I even saw one website where they helped people who had cancer and the first thing they do is remove any root canals or silver mercury fillings. I believe the oil pulling is trying to get this out of you as it's not natural to have something dead left in the body. Once it's gone I believe you will then experience the wonders of oilpulling.