Have you seen her pearly whites?! they are immaculate.
There isnt really dentists, toothbrushes or toothpaste in wow, I assume oral hygiene would be a bit lacking.
On top of that sylvannas is undead and really old, Im sure she has seen some shit, there is no way she would still have all her teeth. Undead racial is cannibalize! have you seen the average not even 100 yr old cannibal teeth, not so pretty!
I want my fantasy blizz!