A single handpiece that can be used in multiple dental treatments is provided. The handpiece comprises a housing having a coil for producing an electromagnetic or electrostrictive field in the housing, and a number of inserts that react with the electromagnetic or electrostrictive field and can be used...http://www.google.es/patents/US4820152?utm_source=gb-gplus-sharePatente US4820152 - Single multi-function handpiece for dental instruments
Single multi-function handpiece for dental instruments
