I'm not sure if this is exactly regrowing whole teeth, but if one had chips in teeth, sounds like it might help.
www.bakerstreetdental.com
This book by Ron Teeguarden mentions a passage in a chinese medicine text about an herb claimed to regrow teeth, after being consumed for a time. It did not specify exactly how long one might need to consume it.
I took an intro class to Chinese medicine and wanted to ask the instructor if she has observed tooth regrowth. But of course she took a question from someone else over some ground up stone or what not. I would love to get new teeth, as I have a number of fillings. It hasn't happened yet. I can only imagine that this herb is either fiction, or if real, it would be in very high demand and difficult to get a hold of.
its actually was of polygonum multiflorum. Modern versions as sold as 'fo-ti' or "he shou wu", but that is actually a bit of a distortion. The name of the herb changes based on how long its been growing, and does slightly different things based on his development. (This is what I remember from the book) He shou wu has to be around 5-11 years old to simply help ones hair to go from grey to a more youthful color. It doesn't always work, as preparation, dose, and patient condition are variables.
I don' remember the age this plant has to be to 'regrow teeth'. But I remember it was something like 150-200 years old. As I said before I can't imagine there being a whole lot of it, and I can only imagine it being expensive, and thus a lot of fakes, like the famed 100year old ginseng, or tibetan cordyceps.
And lastly I have heard of claims around the mantra "om mani padme hum"
"In Tibet, there is the saying of the “Hundred-million” tooth. Many elderly people of eighty or ninety years old would grow new teeth. Just as if they were babies who had just grown out their baby teeth. ..... this is a sign of blessing when one has finished reciting a hundred million Mani mantras."
Karma Rinpoche’s teachings on the Mani Mantra If one diligently practices the heart-mantra of Chenrezig (OM MANI PADME HUNG), it will not only help us to purify negative karma from beginningl…
bodhiactivity.wordpress.com
WHO knows? But it seems more likely someone is motivating people into a lifelong chanting of the mantra, for an uncertain promise. I can only imagine that would take decades if done for a few hours a day.