Surgical implant or instrument with fixing screw

Details Surgical implant or instrument with fixing screw Surgical implant or instrument with fixing screw

A - Human Necessities

61

B

A61B 17/58 (2006.01) A61B 17/00 (2006.01) A61B 17/86 (2006.01) A61B 17/88 (2006.01) A61F 2/30 (2006.01) A61F 2/46 (2006.01) F16B 7/18 (2006.01) F16B 35/00 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2492236

The invention concerns a prosthesis or a surgical instrument comprising two parts (1, 2) one sliding on the other, the lower part (1) being provided with a threaded bore (3) and the upper part (2) being provided with a passage orifice (9) for receiving a fixing screw (4). The invention is characterized in that a set screw (5) can be introduced over its entire length beneath the upper part (2) in the threaded bore (3), said screw including at its upper end a dog point, which is thinner than the threaded part (5) and which is provided with a groove for screwdriver (7). The diameter of the passage orifice (9) is smaller than that of the threaded part and larger than that of the dog point (6). In a preferred embodiment, an elastic device (8) pushes the fixing screw into fixing position.

L'invention concerne une prothèse ou un instrument chirurgical comprenant deux parties (1, 2) coulissant l'une sur l'autre, la partie inférieure (1) étant dotée d'un alésage fileté (3) et la partie supérieure (2) étant pourvue d'un orifice de passage (9) pour recevoir une vis de fixation (4). Selon l'invention, une vis sans tête (5) peut être introduite sur toute sa longueur sous la partie supérieure (2) dans l'alésage fileté (3), cette vis comportant à son extrémité supérieure un téton, qui est plus étroit que la partie filetée (5) et qui est doté d'une encoche pour tournevis (7). Le diamètre de l'orifice de passage (9) est inférieur à celui de la partie filetée et supérieur à celui du téton (6). Dans un mode de réalisation préféré, un dispositif élastique (8) pousse la vis de fixation en position de fixation.

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