A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/44 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)
Patent
CA 2510246
The invention relates to an intervertebral implant (1) characterised by the following: both parts (10; 20) can be displaced in relation to one another by means of two joints (38;39) that are located between the two parts (10; 20); each of the joints (38; 39) has a rotational axis (3; 4) and the two rotational axes (3; 4) run transversally to one another; the two joints (38; 39) are configured by an upper joint section (31) that is connected to the upper part (10), a central joint section (32) and a lower joint section (33) that is connected to the lower part (20); one of the outer joint sections (31; 33) comprises at least one concave sliding surface (58) that is rotationally symmetrical in relation to the rotational axis (3; 4); and the central joint part (32) comprises a convex sliding surface (57) that complements said concave sliding surface (58). The remaining outer joint part (31;33) comprises at least one convex sliding surface (55) that is rotationally symmetrical in relation to the other rotational axis (3; 4) and the central joint part (32) comprises at least one concave sliding surface (56) that complements said convex sliding surface (55).
L'invention concerne un implant intervertébral (1), dont deux parties (10; 20) sont mutuellement mobiles au moyen de deux articulations (38; 39) disposées entre elles (10; 20). Chaque articulation (38; 39) a un axe de rotation (3; 4), les deux axes de rotation (3; 4) étant mutuellement perpendiculaires. Ces deux articulations (38; 39) sont composées d'un élément d'articulation supérieur (31) relié à la partie supérieure (10), d'un élément d'articulation intermédiaire (32) et d'un élément d'articulation (33) relié à la partie inférieure (20). Un des éléments d'articulation externes (31; 33) comporte au moins une surface de glissement concave (58) à symétrie de révolution relativement à un axe de rotation (3; 4). L'élément d'articulation intermédiaire (32) comprend au moins une surface de glissement convexe (57) complémentaire de la surface de glissement concave (58). L'invention est caractérisée en ce que l'autre élément d'articulation externe (31;33) est pourvu d'au moins une surface de glissement convexe (58) à symétrie de révolution relativement à l'autre axe de rotation (3; 4) et l'élément d'articulation intermédiaire (32) est doté d'au moins une surface de glissement concave (56) complémentaire de la surface de glissement convexe (55).
Aebi Max
Burkard Dominique
Frigg Robert
Lechmann Beat
Mathys Robert Jr.
Marks & Clerk
Mathys Medizinaltechnik Ag
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