Implant for osteosyntheses

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/80 (2006.01) A61B 17/86 (2006.01)

Patent

CA 2388854

The invention relates to an implant for osteosyntheses. A plate (1) that is provided with several holes (3) that follow on from each other in a longitudinal direction and screws (2) that can be introduced into the plate (1) through the holes (3) and screwed into a bone (4) in a required position are provided. The holes (3) provided for receiving the screws (2) are alternately offset outwards in relation to an imaginary middle plane (5) of the plate (1), the middle axes (6) of the holes (3) forming an acute angle (W) with the middle plane (5) of the plate (1). The holes (3) are conically tapered starting from the surface (7) of the plate (1) that is outlying as required. The heads (10) of the screws (2) correspond substantially to the sections formed by the holes (3), taper conically towards the shaft (9), which is threaded (8), and can be fixed nonpositively and/or positively in the holes (3). Image

L'invention concerne un implant destiné à des ostéosynthèses. Cet implant comprend une plaque (1) dotée de plusieurs trous (3) successifs dans le sens longitudinal et de vis (2) introduites dans les trous (3) de la plaque (1) et pouvant être vissées dans un os (4) dans une position conforme à leur finalité. Les trous (3) destinés à recevoir les vis (2) sont alternativement décalés vers l'extérieur par rapport un plan central fictif (5) de la plaque (1). Les axes centraux (6) des trous (3) forment un angle aigu (W) avec le plan central fictif (5) de la plaque (1). Les trous (3) sont coniques et à section décroissante à partir de la surface extérieure (7) de la plaque (1), cette surface étant conforme à la finalité. Les vis (2) ont une tête (10) qui correspond sensiblement aux sections formées par les trous (3) et qui est conique et de section décroissante jusqu'à la tige (9), laquelle est dotée d'un filet (8). Cette tête peut être fixée dans les trous (3) par liaison de force et/ou de forme.

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