Dental instrument for removing fractured root canal instruments

An instrument (0) for removing fractured root canal instruments, comprising:

• an instrument housing (1) formed hollow at least at a front end portion thereof;
• a slide (7) non-rotatably held on the instrument housing (1) and guided for translational movement in an axial direction;
• a threaded rod (4) fixed to the slide (7) and engaged with a counter thread of the instrument housing (1) or a counter member held on the instrument housing (1), so that a relative rotational movement between the threaded rod (4) on the one hand and the instrument housing (1) and/or the counter member on the other hand results in an axial displacement of the slide (7);
• a wire (17) clamped by the slide (7) within the instrument housing (1);
• and
• a fastener fastening the wire (17) to the slide (7);
• the hollow instrument housing (1) is open towards a front side thereof, so that the wire (17) is guidable through the open front side into the instrument housing (1) and therein to the fastener;
• the instrument housing (1) having a windowing (9) laterally so that the wire (17) inserted into the instrument housing (1) through the open front side is guidable outwardly through the windowing (9) again and brought into engagement with the fastener;
• the fastener connected to the slide (7) through the windowing (9) of the instrument housing (1) and projecting from the instrument housing (1) so that the fastener with the slide (7) being actuatable from an outside of the instrument housing (1);
• the fastener comprises a threaded bolt (14) inserted into the slide (7) through the windowing (9) and fixed therein, and a locking nut (6) screwed onto an end of the threaded bolt (14) projecting from the slide (7) so that the wire (17) is clampable between the locking nut (6) and the slide (7) to fix the wire (17) to the slide (7);
• wherein a through-hole (15) is formed in the axial direction in the threaded bolt (14) through which the wire (17) is passable, or wherein an annular circumferential groove extending over several turns of a thread of the threaded bolt (14) is formed in a circumferential surface of the threaded bolt (14) for receiving the wire (17) to be fixed to the slide (7).