An ultrasonic insert insertable into a handpiece for carrying out a dental treatment is easily rotatable by a practitioner with only two fingers. The body of the insert is clamped via a torque lock element which carries a plurality of radially extending barbs which lock a handle thereto. The handle is...http://www.google.es/patents/US6811399?utm_source=gb-gplus-sharePatente US6811399 - Torque lock for ultrasonic swivelable inserts and method
Torque lock for ultrasonic swivelable inserts and method
