This is apparently one of the best books out there for strategies on how to avoid cavities, tooth sensitivity, and all other kinds of dental stuff, including root canals, even AFTER the dentist has said you need one. --- The link below takes you to Amazon, which has over 200 reviews. It sounds like his methods work. I'll be getting this book from the local library in a couple days or so, and will get back with a review of my own. Some pwCFS have traced the root of their illness to oral and dental issues and subsequently recovered.