This 1863 image from the Wellcome Trust illustrates a distinctly vampiric set of "Syphilitic malformations of the permanent teeth" — makes you wonder if the visual image of the vampire was inspired by the widespread horrors of untreated syphilis (for an exceptionally visceral window into a society wracked by untreated syphilis, have a look at the Mutter Museum's display of syphilitic skulls).
L0021139 “Syphilitic malformations of the permanent teeth”.
(via JWZ)