Unlike reptiles and fish, which usually replace their fangs on a regular basis, it is widely accepted that humans and most other mammals only grow two sets of teeth.
But hidden underneath our gums are the dormant buds of a third generation, according to Katsu Takahashi, head of oral surgery at the Medical Research Institute Kitano Hospital in Osaka.
[…]
Tests on mice and ferrets suggest that blocking a protein called USAG-1 can awaken the third set, and the researchers have published lab photographs of regrown animal teeth.
In a study published last year, the team said their “antibody treatment in mice is effective for tooth regeneration and can be a breakthrough in treating tooth anomalies in humans”.
Granted, your existing teeth will fall out all at once the next time you are really nervous and your new set of teeth will finish growing in when you turn 98.
