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Humans Have a Third Set of Teeth. New Medicine May Help Them Grow.
https://www.popularmechanics.com/science/health/a70366090/humans-have-third-set-of-teeth-new-medicine/
@atomic
More than twenty years ago I saw news on TV claiming they could grow tooth enamel on the outside of mice bodies and then use it for human dentistry but that the technology has not been made available to the general public yet