When will stem cell regeneration of new teeth become mainstream?

Not Soon Enough: Researchers can grow enamel in the lab. The abilities to form teeth, have them with dentin and enamel for strength, be of the correct tooth (molar, premolars, incisor) etc. Is way off.

Not before your need: Astonishing progress is being made in using stem cell research to grow and repair new tissues. Growing new teeth in a damaged jaw is and extremely challenging task, and while we have implanted tooth germs in experimental models, even this does not look like a predictable treatment in humans for a long time. You better brush and floss the ones you've still got and look at implants as an alternative.

Soon: University of illinois college of dentistry already cloning teeth from stem cells and replanting them in rats. Humans can't be far behind.

Teeth: The uk announced 10 years ago that they would be cloning teeth in humans within five years;still waiting however i agree it should not be long in relative terms; perhaps 7 years before human trials.