Dental hand piece.

摘要

The invention relates to a dental handpiece (1) for an endodontic filing tool (18), which is clamped in the handpiece and is secured both against rotating and against axial movement. A vibration movement is imparted to the tool. …In this case it is proposed that the tool (18) should be clamped at its rear shaft end with a slight play, and that the vibrations should be imparted to the tool at its front shaft end (7b) by means of a rotating component (15). This surrounds the front shaft end (7b) with slight play and has a cylindrical recess whose cross-sectional shape is that of an orbiform curve. In this way, the tool is displaced in an oscillating movement perpendicular to its axis. …The component (9) rotates preferably at about 20,000 rpm. ……