That makes two. My teeth are terrible. When I was a kid and people would warn me about sugar I would always argue that in the future we'd just be able to replace our teeth. Any day now...
I'm starting to think my bad teeth are going to kill me before stem cells get around to regrowing them for me.
I'd rather they grew them in vivo. Implanting a fully functioning tooth would still be a difficult operation.
Adults occasionally grow a third set of teeth. Maybe it will someday be possible to trigger a person to grow a new set of teeth.