glow in the dark teeth

Glow-in-the-Dark Teeth are a Big Hit in Japan [VIDEO]
The new trend in Japan is LED teeth -- a mouth-guard like insert that lights up when the user smiles.
Especially popular among Japanese schoolgirls, some  also purchase a wireless hand-held computer which allows them to switch up the colors of their LED teeth on the fly.
Anyone who has seen a hip-ho…