ABSTRACT
The three components of the ultrasonic system are a high-frequency, computer-controlled generator, a hand piece that houses the ultrasonic transducer, and a variety of interchangeable blade configurations (Figures 24.1-24.3). The hand piece contains piezoelectric ceramics that look like a stack of 15 nickels piled on top of one another. A computercontrolled electrical signal causes the piezoelectric ceramics in the ultrasonic hand piece to
expand and contract (Figure 24.4), converting electrical energy to mechanical motion (ultrasound). The transducer, attached to the mount, transmits the ultrasonic vibration to the attached blade. To simplify, the electric signal sent to the transducer in the ultrasonic hand piece is converted to mechanical motion. The result is vibration of 55 500 cycles/s.
