To be fair, the research is on regenerating, not regrowing. I wouldn’t expect regrowing lost teeth to be possible any time soon, unless some kind of bio 3D-printing method became available.

“Dental enamel has a unique structure, which gives enamel its remarkable properties that protect our teeth throughout life against physical, chemical, and thermal insults,” said lead author Dr. Abshar Hasan

This man doesn’t just disapprove of people mistreating their teeth, he is personally insulted by it. A true dentist.