Patent ID: 6645248
Filing Date: 2003-11-11
Classification: A61F

Abstract:
An artificial intervertebral disc for implanting between two vertebral bodies (W) comprising two end plates (1, 2) which bound a hollow space (4), which is filled with an elastically and/or plastically deformable nucleus (3), at two opposite sides, the hollow space (4) comprising an inner region and an outer region surrounding the inner region, the outer region being bounded by opposing faces of the end plates, and the inner region being bounded by a concave bearing face of the one end plate and an opposing convex counterface of the other end plate, the distance between the concave bearing face of the one end plate and the opposing convex counterface of the other end plate in the inner region being smaller than the distance between the opposing faces of the end plates in the outer region, with the hollow space (4) being enclosed by a tubular fibre ring (5) such that the end plates (1, 2), together with the fibre ring (5), bound the hollow space (4) and the end plates (1, 2) are in tensile connection with the fibre ring (5), wherein the fibre ring (5) is designed as elastically extensible in the radial and axial directions, with the fibre ring (5) having a larger modulus of elasticity than the nucleus (3) and the nucleus (3) and the fibre ring (5) interacting such that the elastic properties of the artificial intervertebral disc show a non-linear behaviour with increasing deformation at least with respect to a compression force (F).