your teeth are about 97% this substance, and peer-reviewed studies have shown that brushing with it is at least as effective as brushing with fluoride. nasa has done large amounts of research into the molecule as a way to rebuild teeth and bone after extended periods in space.
it's an experiment, but it makes sense - if i can get the right process, with small enough particles, my body should pull this molecule up into my teeth, in tact.
what your body can't do is rebuild enamel from source, because the molecule is too complicated. but, absorbing it in tact is a different question, and seems to be far more likely, if technically unproven.
in the long run, i'm hoping to be able to stimulate stem cells in my mouth to regrow the lost gumline, but that may be a few years down the road.