| 摘要 |
<p>A handpiece having a set of longitudinally vibrating piezoelectric elements and an electric motor to provide rotational or oscillatory movement to the ultrasound horn. The ultrasound horn and the shaft of the motor are held within the handpiece shell by spring-loaded seals. The portions of the ultrasound horn and the motor shaft that rotate and longitudinally vibrate within the seals are hardened, such as by plating with titanium nitride or other hard coating. Such a hardening process increases the life of the handpiece.</p> |
