Ultreo

Ultreo combines sonic bristle action with ultrasound waveguide technology, cleaning your teeth better than a conventional electric toothbrush. The ultrasound waves (the same technology that cleans surgeons scalpels) whip your toothpaste into a froth of microscopic bubbles that penetrate all the hard to reach places in your mouth.

Ultreo has been proven to remove hard to reach plaque, improve gum health, and reduce stains for naturally whiter teeth.

Ultreo works on ultrasonic frequencies (greater than 20,000 Hz), unlike other electric toothbrushes that work in the audible 20Hz - 20kHz range. The manufacturer claims that positive results will show up in 14 days, and also offer a 30-day money back guarentee. This toothbrush is also more expensive than its competitors; available for $149.