This is very striking considering according to Proffit's 1994 Contemporary Orthodontics, two-thirds of the US population has some degree of malocclusion — misalignment of the teeth.
The small platinum sculpture, which features real human teeth and over 8,000 diamonds, was promoted with an asking price of £50m—a tabloid tactic that clearly missed its target as the work failed to sell.
But whilst armadillos and sloths do have rudimentary teeth, if you were to perform a dental examination on one of these guys, which would be difficult because their mouth is so small, you'd find no teeth at all.