Humans are very fortunate that teeth don’t grow like nails.

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Highly unfortunate you mean. Having infinitely self rejuvenating teeth would be incredibly beneficial.

Evipicc

We are however unlucky to only get 2 sets of teeth and never more

leonapp1

Or start flaccid and get hard when you’re hungry.

Mildleyy

No, not really. I wanna get rid of my current set of teeth and grow new ones. ;-;

Embarrassed_Trick_91

Rodents seem to cope with this quite well. Although it does occasionally lead to problems for them.

Smugglers151