Artificial intervertebral disc having an articulating joint

Details Artificial intervertebral disc having an articulating joint Artificial intervertebral disc having an articulating joint

A - Human Necessities

61

F

A61F 2/44 (2006.01)

Patent

CA 2556364

An intervertebral device includes a first plate (10) having an outer face (12) and an inner face (18), and a second plate 30 juxtaposed with the first plate, the second plate having an outer face (32), an inner face (34) that opposes the first plate (10) and a concavity (38) that opposes the first plate (10). The device includes an elongated member (50) extending from the first plate (10) toward the second plate (30), the elongated member (50) having a distal end (54) with a spherical surface that is engageable with the concavity (38) of the second plate (30) for providing an articulating joint between the first and second plates. The device also includes a resilient member (60) in contact with the elongated member (50) for counteracting compressive loads on the plates, the resilient member (60) being surrounded by the concavity (38) of the second plate (30).

L'invention concerne un dispositif intervertébral qui comprend une première plaque (10) à face externe (12) et face interne (18), et une seconde plaque (30) juxtaposée à la première, la seconde plaque ayant aussi une face externe (32), une face interne (34) opposée à la première plaque (10) et une cavité concave (38) opposés à la première plaque (10). Le dispositif comprend un élément allongé (50) qui s'étend depuis la première plaque (10) vers la seconde plaque (30), cet élément (50) ayant une extrémité distale (54) à surface sphérique qui s'imbrique dans la cavité (38) de la seconde plaque (30) pour constituer une articulation entre les deux plaques. Le dispositif comprend aussi un élément flexible (60) en contact avec l'élément allongé (50) pour s'opposer aux charges de compression sur les plaques, l'élément flexible (60) étant entouré par la cavité (38) de la seconde plaque (30).

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