Hi Sam! Yes, I'm still here, even though I don't post much - but I do read all of your entries, and enjoy your stories and insights very much. If I do not comment, that's only because I have nothing original or witty to say... :-o Maybe I should create something similar to cuddlekitten, just to acknowledge and appreciate postings.
Having root canals is a difficult position to be in, especially after knowing what they can do to the body. To add to the text I posted above: It is possible (but I don't know how likely) that there are no anaerobic bacteria inside, and the tooth is just sitting there, not causing any harm.
As for regrowing teeth: I think it is very much possible. Weston Price in his books describes how a young girl was scheduled to have her cavities filled by a dentist. She managed to fill them by eating food high in vitamins (if I recall correctly, it was butter with high K vitamin content). Which tells me several things: (a) Cavities do not need to be drilled out and filled. Teeth material does indeed regrow!! (Scientists also used to say that brain cells do not regrow, now they have changed that in the face of evidence. And it is still current scientific belief that severed nerve cells do not regrow, but many cases have shown that this is also not exactly correct.) (b) Highly nutritious food can indeed heal the body in ways that the scientific establishment won't tell you (or will tell you it's impossible).
Ultimately, everything comes down to what we believe, and how negative beliefs affect us. Having absolute, unadultered faith in something will manifest without fail!