摘要 |
A dental handpiece for use with a device for treatment of teeth by means of a jet of an abrasive powder mixed with air and water comprises a first one-way valve means in a first supply line for pressurised air connected to an integrated powder container of a gripping sleeve whereby at least a first filter means is further provided in this first supply line at a position upstream of the first one-way valve means and downstream of a connecting end of the supply line with a common supply means for air and water which is provided at the rearward end of the gripping sleeve. A second filter means is provided at a position downstream of the first one-way valve means in the first supply line and a second one-way valve means is provided in a second supply line for water together with a third filter means. The first and third filter means each comprise a fine-meshed screen body. The second filter means comprises a microporous sintered metallic body or a microporous plastic body.
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