Medical or dental hand instrument

摘要

The instrument (1) has a hand piece (2) with a grip part (6) and an outlet aperture (5) in front of the grip part. The outlet aperture to discharge an abrasive treatment medium together with a transport fluid. A coupling connection (4) is provided to couple the instrument to a supply conduit for at least one transport fluid, e.g. water or air. The coupling connection is formed as a coupling part (14b) of a coupling (13). The coupling part is arranged on an insert part (20) which fits inside an insert holder or recess (19). The coupling part has one or more coaxial or axially parallel sealed socket couplings (10) at its downstream end, which connect a feed conduit (9,11) for the transport fluid with a continuing feed conduit (21,22) in the instrument. Sockets (17,18) also extend from the insert part, which fit into the continuing feed conduit.