You read that right, LED grills are the latest fad to hit Japan. Put simply, these are “an LED insert which can be affixed to your teeth (a bit like a mouth guard) and which lights up when you smile.” Video after the break.

You can even get a wireless hand-held computer by which to control the contraption, making your teeth change change color – from a lurid green to demonic-looking red – or even blink.

[via Dailymail]