| 摘要 |
A dental tool and handpiece, wherein the tool has a projecting cylindrical, flexible flange extending into a cylindrical recess in the handpiece and sealable thereinto by centrifugal force. Various forms are illustrated. The operation of the flange is independent of the attaching means for the tool, and end forces on the tool are not transmitted through the flange, but rather are transmitted through a driven shaft on which the tool is mounted, thence through a driven gear having a thrust bearing engagement with the closed end of the head.
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