Intervertebral implant

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01)

Patent

CA 2598136

The inventive intervertebral implant (1), in particular an artificial intervertebral disc comprises a central axis (2), a top part (3) and a lower part (4), wherein A) the top part (3) is provided with a top apposition surface (5) which rests on a base plate of a superimposed vertebral body, B) the lower part (4) is provided with a lower apposition surface (6) for resting on the covering plate of an underneath vertebral body, C) one part (3, 4) comprises a convex joint element (12) provided with a convex sliding surface (11) and the other part (3, 4) comprises a joint shell (13) provided with a complementary concave surface, D) the convex joint element (12) and the convex joint shell (13) form a joint (9) by means of which the two parts (3, 4) are rotatable with respect to each other around at least one axis of rotation and E) the intervertebral implant (1) is permeable to x-rays.

L'invention concerne un implant intervertébral (1), en particulier un disque artificiel présentant un axe central (2), une partie supérieure (3) et une partie inférieure (4), caractérisé en ce que A) la partie supérieure (3) présente une surface d'apposition supérieure (5) appropriée pour prendre appui sur la plaque de base d'une vertèbre située au-dessus ; B) la partie inférieure (4) présente une surface d'apposition inférieure (6) appropriée pour prendre appui sur la plaque de recouvrement d'une vertèbre située au-dessous ; C) l'une des deux parties (3, 4) comprend un élément d'articulation convexe (12) à surface de glissement convexe (11), et l'autre des deux parties (3 ; 4) comprend une coque d'articulation (13) à surface de glissement complémentaire ; D) l'élément d'articulation convexe (12) et la coque d'articulation (13) forment une articulation (9) au moyen de laquelle les deux parties (3 ; 4) sont en rotation l'une par rapport à l'autre, autour d'au moins un axe de rotation, et E) l'implant intervertébral (1) est transparent aux rayons X.

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