A new way to get rich

Yesterday in the dentist's chair I came up with yet another great idea for untold wealth: light-emitting diodes in ones teeth. Here's how it would work. small lights would be installed in the front teeth by the dentist. To power them the dentist would use filling material that would interact with one's saliva to produce the electricity to power the lights. Then we could have lights 24 hours a day. Just think of flashing lights lighting up your smile and even beautifying your sleep! If you wanted to read in the dark you would just have to open your mouth. Never would you need a flashlight again. Whole power grids could be retired. We could call the lights "The Bling Thing". I can almost see this as a great ecological event saving the world from its doom. What do you think?