A Hearing Aid That Uses Bones to Conduct Sound
From: Popular Science - 05/2010
By: Elizabeth Svoboda

Tooth-mounted hearing aid - a device that restores hearing by transmitting
sound through the teeth and bones 

The SoundBite Hearing System is the world's first non-surgical and removable
hearing solution to use the well-established principle of bone conduction to
imperceptibly transmit sound via the teeth. It is intended to help patients
who are essentially deaf in one ear regain spatial hearing ability and rejoin
the conversation of life. Nearly invisible when worn, the SoundBite system
consists of an easy to insert and remove in-the-mouth hearing device - which
is custom made to fit around the upper, left or right, back teeth - and a
small behind-the-ear microphone unit. No modifications to the teeth are
required. 

Read the entire article at:
http://www.popsci.com/diy/article/2010-05/invention-awards-hearing-aid-conducts-sound-through-your-bones

Link:
Sonitus
http://www.sonitusmedical.com/product/