== Safety of ultrasound ==Ultrasound has been used in Medicine for close to half a century and its safety has been studied for almost the same period of time.
V letu 2008 se je novi lastnik Salton Corporation odločil za umik s trga ustne higiene, kar je vodilo v nastanek novih blagovnih znamk ultrazvočnih zobnih ščetk, kot so Ultreo®, Megasonex®, Smilex® in Emmi-Dent®.