I don't know about this hormone, but human clinical trials for a tooth-regrowing drug will begin in September. It was successful in animal models.

https://www.engadget.com/the-worlds-first-tooth-regrowing-dr...

If this works and becomes a common dental procedure I will be soooo happy. Every time I go to the dentist I ask them if anything like this is coming down the pipeline and they laugh...