I'll avoid making this post too technical and boring. Simply speaking, piezosurgery is a technique which first came out of Europe (Italy), and utilizes ultrasonic energy to manipulate bones. The technique is completely atraumatic to soft tissue (skin, fat, muscle, cartilage), and will selectively manipulate only bone. Thus, piezosurgery techniques are directed toward the upper third of the nose, which is mostly bone (ie, humps, bumps, crookedness).