[quote=@Larfleeze]
<Snipped quote by Halo>

Are they natural? I always assumed they were like that because of tooth decay or chip damage.
[/quote]

Yep - [i]not[/i] having them is technically unnatural, as it's the result of natural grinding/wear and tear over the years, though either having them or not having them. I imagine they evolved so your "adult" teeth grow through your gums more easily?