ultrasonic device for medical purposes or aesthetic

ultrasonic device for medical and / or cosmetic for modifying tissue and / or biological membranes, comprising a body incorporating an ultrasound source comprising at least a means of self-adjusting displacement versus cavitation it generates. More specifically, said ultrasonic source is kept free or movable within said body, along at least one degree of freedom. Self-adjusting said at least one moving means is an axial translation means within said device, along the axis of propagation of the ultrasonic waves and consists of at least one elastic means and / or at least one guide and / or at least stubborn.