Device for the elastic stabilisation of bodies of the vertebra

Details Device for the elastic stabilisation of bodies of the vertebra Device for the elastic stabilisation of bodies of the vertebra

A - Human Necessities

61

B

A61B 17/70 (2006.01)

Patent

CA 2540591

A device (1) for the elastic stabilisation of bodies of the vertebra with A) at least two bone anchoring means (2), each of them having a central axis (3) and a head segment (4), and B) elastic means (5), which have a longitudinal axis (12) and can be joined with the head segments (4) of two adjacent bone anchoring means (2) in such a manner, that the longitudinal axis (12) extends transversely to the central axes (3), while C) under compressive load the elastic means (5) have a progressive spring characteristics (20), wherein D) the elastic means is manufactured from a metallic material, and E) comprise spring coils (19), of which at least two spring coils (19) have a geometric dimension which is different.

L'invention concerne un dispositif (1) de stabilisation élastique de corps vertébraux, comprenant : A) au moins deux moyens d'ancrage osseux (2) présentant chacun un axe central (3) et un segment de tête (4) ; et B) des moyens élastiques (5) présentant un axe longitudinal (12) et aptes à être assemblés avec les segments de tête (4) des deux moyens d'ancrage osseux voisins (2), de telle façon que l'axe longitudinal (25) soit perpendiculaire aux axes centraux (3), caractérisé C) en ce que les moyens élastiques (5) présentent, lors d'une contrainte à la compression, une caractéristique élastique progressive (20), et en ce que D) les moyens élastiques (5) sont fabriqués en un matériau métallique et E) comprennent des spires élastiques (19), dont au moins deux spires (19) présentent une géométrie différente l'une de l'autre.

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