Lets suppose there is a race of Immortal beings. What are possible solutions to them slowly losing their teeth due to wear and tear? After all, if a normal human lived for hundreds of years at some point he'd lose his teeth.
Edit: I meant immortal like elves in The Lord of the Rings, they can be killed but are immune to aging. Dentures are not an option (at least not for them). And since teeth that don't stop growing could cause awkward scenariors and are a potential health hazard (squirrels can die from that, if I remember correctly...) I'd rather not use that.