Huh--well, this person who uses a zapper hasn't had ANY recurring teeth infections--just lost teeth because of oil pulling--It destroyed the fillings and they broke out, and the crowns bases, made of amalgam, broke down and allowed cavities to form under the crown, so they broke off. So if you're oil pulling, stop if you have Amalgam fillings until you can get them replaced. I have no idea if the other kinds of fillings are any better though. Let us know, eh?