Device for distracting or compressing bones or bone fragments

Details Device for distracting or compressing bones or bone fragments Device for distracting or compressing bones or bone fragments

A - Human Necessities

61

B

A61B 17/02 (2006.01) A61B 17/58 (2006.01) A61B 17/88 (2006.01) A61B 17/66 (2006.01)

Patent

CA 2432516

The invention relates to a device for exerting axial forces on bone fragments or vertebral bodies. The inventive device comprises A) a first connecting element (1); B) a second longitudinal connecting element (2) which is displaceable relative to the first connecting element (1); C) a longitudinal support (4) with a longitudinal axis (5) and a front end (6) that can be linked with the first connecting element (1); D) a tubular sleeve (8) that is coaxial relative to the longitudinal axis (5) in which the longitudinal support (4) is displaceable parallel to the longitudinal axis (5) and that comprises a front end (9) that is directed against the first connecting element (1); E) at least one first lever (12) that rotatably links the front end (9) and the second connecting element (2); F) at least one second lever (13) that is rotatably disposed on the first connecting element (1) and on the second connecting element (2) so that G) a relative movement between the front end (9) and the first connecting element (1) results in a relative movement between the first and the second connecting element (1; 2) along a line (20) that substantially extends traversely to the longitudinal axis (5).

L'invention concerne un dispositif pour exercer des forces axiales sur des fragments osseux ou sur la colonne vertébrale comprenant A) un premier élément de fixation (1); B) un second élément de fixation longitudinal (2), mobile par rapport au premier élément de fixation (1); C) un longeron (4) suivant un axe longitudinal (5), dont l'extrémité (6) avant peut être raccordée au premier élément de fixation (1); D) un manchon (8) en forme de tube, coaxial à l'axe longitudinal (5), dans lequel le longeron (4) peut être glissé parallèlement à l'axe longitudinal (5), et qui comprend un embout (9) avant orienté contre le premier élément de fixation (1); E) au moins un premier levier (12) pivotant reliant l'embout (9) avant au second élément de fixation (2); F) au moins un second levier (13), monté pivotant sur le premier élément de fixation (1) et sur le second élément de fixation (2); de sorte que G) un mouvement relatif entre l'embout (9) avant et le premier élément de fixation (1) se traduit par un mouvement relatif entre le premier et le second élément de fixation (1;2) suivant une ligne (20) pratiquement transversale par rapport à l'axe longitudinal (5).

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