Ultrasonic Toothbrush on WIKI

Ultrasonic toothbrush is an electric toothbrush designed for daily home use that operates by generating ultrasound in order to aid in removing plaque and rendering plaque bacteria harmless.

It typically operates on a frequency of 1.6 MHz, which translates to 96,000,000 pulses or 192,000,000 movements per minute.

Ultrasound is defined as a series of acoustic pressure waves generated at a frequency beyond human hearing

 History

The first ultrasonic toothbrush, initially branded Ultima and later Ultrasonex by Sonex Corporation, was first patented in the USA in 1992 by Robert T. Bock, the same year the FDA gave it approval for daily home use.