British engineers say they have invented a revolutionary tooth implant that works like a mobile phone and would not be out of place in a James Bond spy movie. The "tooth phone" consists of a tiny vibrator and a radio wave receiver implanted into a tooth during routine dental surgery. The phone was designed by James Auger and Jimmy Loizeau. The implant does not yet have its own microchip installed, but Auger says the technology is tried and tested, and a fully functional phone could be put together in no time at all. "With the current size of microchips, this...