The pig’s mouth revealed its ordinary sharp, tusk-like canines saddled up beside smaller, slightly more human-looking teeth nubs. In theory, a similar process could play out in humans.

DEAR DR. ROACH: What causes the growth of new teeth at my current age? I am a 74-year-old woman in good medical health except for a transient ischemic attack (TIA). Generally, I feel well and keep ...

I have all of my teeth except for my wisdom teeth. I have never had a toothache. — M.G. Dear M.G.: A person is born with all the teeth they will ever get, but they are not normally erupted at birth.

Mr Zhang added: “We have different ideas to put the teeth inside the mouth. We could transplant the young tooth cells at the location of the missing tooth and let them grow inside the mouth.

Inside the effort to regrow ‘permanent’ teeth—stem cells, gene-editing, drugs, and more. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

We could transplant the young tooth cells at the location of the missing tooth and let them grow inside the mouth. “Alternatively, we could create the whole tooth in the lab before placing it in ...