An electric toothbrush is disclosed. The electric toothbrush includes a body having an interior hollow region for retaining one or more motors, batteries, and drive mechanisms. The toothbrush includes multiple bristle carriers. Each of the bristle carriers undergoes some type of movement and is driven...http://www.google.es/patents/US7340794?utm_source=gb-gplus-sharePatente US7340794 - Multi-motion toothbrush
