What is this called that Jared Leto's Joker has?

If these aren't grillz in his teeth what are they?

Bad creative team, that what is this is.

Pilasy:La Voix d'un homme

For him to have a grill, they would all need to be one piece, and most likely feature gold and diamonds.

I think caps or crowns are what people call these.

theyre called caps.

Ooooh, shiny