Bone plate with conical screw threads

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/80 (2006.01)

Patent

CA 2367088

The bone plate comprises a top side (1), an underside (2) to make contact with the bone, and several holes (4) mounted along the longitudinal plate axis (3) and connecting the top side and the underside (1) and (2) to receive bone screws (11). The diameter DL of at least one of these holes (4) is larger along the longitudinal plate axis (3) than this hole's diameter DQ transverse to the longitudinal plate axis (3). At least one of these holes (4) is fitted with an inside thread (5). This inside thread (5) tapers conically toward the bone plate's underside. The bone plate allows application as a compression plate and as a so-called inner affixation system without entailing tradeoffs.

L'invention concerne une plaque pour ostéosynthèse présentant un côté supérieur (1), un côté inférieur (2) destiné à venir en contact avec l'os, ainsi que plusieurs trous (4) reliant le côté supérieur (1) et le côté inférieur (2), situés le long de l'axe longitudinal (3) de la plaque et servant à recevoir des vis pour ostéosynthèse (11). Le diamètre DL d'au moins un de ces trous (4), mesuré en direction de l'axe longitudinal (3) de la plaque, est supérieur au diamètre DQ de ce même trou, mesuré perpendiculairement à l'axe longitudinal (3) de la plaque. Au moins un de ces trous (4) présente un filetage intérieur (5) qui se rétrécit de manière conique vers le côté inférieur de la plaque. Cette plaque pour ostéosynthèse peut s'utiliser sans compromis comme plaque à compression et comme fixateur interne.

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