D&D 3E/3.5 New body slot( dentures )

[rgard]

In 1e we managed to kill a unicorn. We took its horn and had individual replacement teeth made that would protect our characters against poison.

 

[abe ray]

Teeth of clumsiness: when worn you look like you have teeth like goofy! A side effect is that you are EXTREMELY clumsy, but EXTREMELY lucky in that your usually not hurt by your clumsiness !

 

[Wofano Wotanto]

Well, if you don't mind system agnostic writeups, there's Grandmother's Hexing Tooth over on my much-disused RPG blog. There's also the loosely-related Toothsome Curse and some tooth-rotting sweets in the form of Grandmother's Candies over there.