| 摘要 |
The present invention provides a mechanically driven reciprocating dental handpiece (1) comprising a blade-holding sleeve (3) reciprocally held within the handpiece, an outer surface of the sleeve being in juxtaposed relationship with an internal surface of the handpiece. The sleeve is restrained from rotation during operation of the handpiece by the combination of a protrusion and a groove on the handpiece and on the tool shank. Preferably, there is formed, extending into and beneath the outer surface of the sleeve, a vertically extending notch (310) and on the inner surface of the handpiece, a protrusion (8) designed to fit within the notch in the sleeve. In the most preferred embodiment of this invention, the fluid dispensing and reciprocating abrading tool (7) of the present invention is formed integrally with a sleeve comprising a shank portion (100) designed to be juxtaposed within a handpiece and to be directly driven by the eccentric driver. |
