Implant having a sheath with a motion-limiting attribute

Details Implant having a sheath with a motion-limiting attribute Implant having a sheath with a motion-limiting attribute

A - Human Necessities

61

F

A61F 2/44 (2006.01)

Patent

CA 2605470

A prosthetic intervertebral disc (10) containing two opposing shells (20, 40), a central body (60) disposed between the shells, and a flexible sheath (70) extending between edges of the opposing shells. The sheath provides for resisting at least one predetermined type of relative directional motion. In one embodiment, this resistance is acieved by the sheath having an anterior aspect (d1) which is greater in height than the posterior aspect (d2).

L'invention concerne une prothèse discale intervertébrale (10) contenant deux coques opposées (20, 40), un corps central (60) disposé entre ces coques, et une gaine souple (70) s'étendant entre les bords des coques opposées. La gaine exerce une résistance contre au moins un type prédéterminé de mouvement directionnel relatif. Dans un mode de réalisation, cette résistance résulte du fait que la gaine présente un côté antérieur (d1) dont la hauteur est supérieure à celle du côté postérieur (d2).

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