This is about the possibility (or lack thereof) for a person to re-grow a new "permanent tooth" or set of teeth, to replace the teeth that grew after their milk teeth fell out.
I had earlier seen some anecdotal evidence on the internet that this would have happened to some people.
Anyway, what I wanted to ask is if there is any scientific evidence (e.g. properly recorded unusual medical phenomena) that shows that a person has grown a tooth (or a set of teeth) to replace their permanent teeth?