Instrument for preparing and/or machining a femoral head

Details Instrument for preparing and/or machining a femoral head Instrument for preparing and/or machining a femoral head

A - Human Necessities

61

B

A61B 17/17 (2006.01) A61B 17/28 (2006.01)

Patent

CA 2624732

The invention relates to an instrument for preparing and/or machining a femoral head (11) embodied on a femoral neck (19). Said instrument comprises tactile forceps (91) that are provided with two forked levers (13, 15) and two tactile jaws (23, 25), each of which is assigned to one of the forked levers (13, 15). The forked levers are interconnected at a fulcrum (93). The inventive instrument features a manipulating end and a working end. The tactile jaws are located at the working end of the instrument. A guiding element (28) is provided which encompasses a centering pin (21) and is mounted and/or guided at least at two points (105, 107) spaced apart from each other in the direction of the centering pin (21) in such a way that the centering pin (21) always lies on a central plane (12) of the tactile forceps (91) regardless of an opening angle of the tactile forceps (91), said central plane (12) containing the fulcrum (93). The bearing and/or guiding points (105, 107) are directly and/or indirectly hinged to the tactile forceps (91).

L'invention concerne un instrument permettant de préparer et/ou de traiter une tête de fémur (11) qui est réalisée sur un col de fémur (19). Cet instrument comprend une pince de manipulation (91) qui, à son tour, comprend deux leviers à pinces (13, 15) et deux mâchoires de manipulation (23, 25) respectivement associées au levier à pinces (13, 15). Le levier à pinces est relié à un point de rotation (93) et l'instrument présente un côté de manipulation et un côté de travail. Les mâchoires de manipulation sont placées sur le côté travail de l'instrument. Un élément de guidage (28) doté d'un axe de centrage (21) est monté et/ou guidé sur au moins deux emplacements (105, 107) en direction de l'axe de centrage (21) de telle façon que l'axe de centrage (21) se situe toujours dans un plan central (12) de la pince de manipulation (91) quel que soit l'angle d'ouverture de la pince de manipulation (91). Ce plan central (12) contient le centre de rotation (93). Les emplacements de palier et/ou de guidage (105, 107) sont articulés directement et/ou indirectement à la pince de manipulation (91).

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