One who has broken tooth, his/her tooth can come back as a natural tooth and also one who has half broken tooth, then his/her tooth can also be regenerated.
I Have Heard That Natural Tooth Regeneration is Now Possible. Is It True?
Doctor Answers 2
Can we regenerate teeth?
The short answer is yes the question is size shape and location were not their yet but we will get there good luck
Kevin Coughlin DMD, MBA, MAGD CEO Baystate Dental PC
Growing new teeth
It's certainly on the horizon but no human studies of value yet published showing successful regeneration to my knowledge. But technology is moving fast in this age :-)
Vijay Bhagia, Houston TX