Found this exciting article today (since I am having some current dental issues, it is of especial interest, but alas, likely years down the road to actual clinical application!)
Body's Own Stem Cells Can Lead to Tooth Regeneration | Columbia University Medical Center
That's right, you would have the form integrated into your extraction socket, and presto, 9 weeks later, a whole new tooth.
And, it uses your own body's stem cells, so no controversy there.
Medicine, Star Trek style:
[YOUTUBE="http://www.youtube.com/watch?v=t9tY5HEpR-U"]Doc gave me a pill and I grew a new kidney![/YOUTUBE]
Edit: Just looked up some more info on "cell homing" and the use of "bioscaffolds" - pretty amazing stuff. Here's a link to a study on joint regeneration too: Stem Cell 'Homing' Fixes Joints in Rabbit Experiments - ABC News