Stumbled upon this article about oil pulling. Apparently, you can heal cavities.
Not sure about this, might have to try it myself. I must admit, though, that this is not the first time that I see coconut oil being good for the teeth. I have tried brushing my teeth with a little bit of coconut oil in the past, but have not kept this habbit going for long. It tends to leave a bad aftertaste and smell after a few hours of closed mouth… However, have to say that coconut oil is helping for sensitive teeth.
Anyway, Dr Mercola has put together a very good article that covers oil pulling and other minimally invasive dentistry.