== 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.
Najpogostejša frekvenca ultrazvočnih zobnih ščetk, pri kateri so bile tudi izvedene številne znanstvene študije , je v območju približno 1,6 MHz oziroma 96.000.000 pulzov ali 192,000,000 gibov na minuto.