Well, it really show very little. ^^' I think Imorgado may be better off looking at reversed video of normal teeth growth like these ones.
https://www.youtube.com/watch?v=mlhkecLd9Wo
https://www.youtube.com/watch?v=ZdglZymoIyQ
Surely there's tools out there on the internet to look at video in reverse. I know there is for gifs.