An automated hands-free personalized cleansing device for oral hygiene is described in which a robotic cleansing head is mounted for reciprocatable movement on a mounting base and is powered and controlled by a computer module to provide multiple movements of the brush portion thereof in and out, up...http://www.google.com/patents/US6152733?utm_source=gb-gplus-sharePatent US6152733 - Automated hands free oral cleansing device with bite block and computer control
