Spinal Arthroplasty System
The invention relates to a spinal arthroplasty system for putting into place between two contiguous vertebrae (V1, V2). The arthroplasty system comprises: an at least partial prosthesis ( 12 ) for the intervertebral disk; and an intervertebral implant ( 14 ) comprising: a spacer ( 20 ) for placing between the spinous processes of the two vertebrae, said spacer including at each of its ends a housing ( 22, 24 ) for receiving one of the spinous processes; and at least one tie ( 26, 28 ) for holding each spinous process in a housing of said spacer.
1 - 9 . (canceled)
10 . A spinal arthroplasty system for placing between two contiguous vertebrae, comprising:
an at least partial prosthesis of the intervertebral disk selected from the group comprising ball-and-socket type mechanical prostheses and intervertebral disk nucleus prostheses; and
an intervertebral implant comprising:
a spacer for placing between the spinous processes of the two vertebrae, said spacer having a housing at each of its ends for receiving one of the spinous processes; and
at least one tie for holding each process in a housing of said spacer.
11 . A spinal arthroplasty system according to claim 10 , wherein said prosthesis comprises:
a ball-and-socket type mechanical prosthesis for the intervertebral disk comprising:
a first assembly presenting a fastener face for fastening to a vertebra and an active face having a portion in the form of a concave first substantially spherical cap; and
a second assembly presenting a fastener face for fastening to a vertebra and an active face including a portion in the form of a convex second substantially spherical cap for co-operating with the first spherical cap.
12 . A spinal arthroplasty system according to claim 11 , wherein each of said first and second assemblies of said prosthesis includes a fastener element including said fastener face and a prosthesis element including said active face, said elements being provided with mechanical means for securing them together.
13 . A spinal arthroplasty system according to claim 11 , wherein each prosthesis element comprises two distinct parts for placing side by side, each part having a fastener face and an active face, and in that each prosthesis assembly further comprises means for securing the two parts together, the active faces of the two secured parts defining one of said spherical caps.
14 . A spinal arthroplasty system according to claim 10 , wherein each prosthesis assembly is constituted by a single part.
15 . A spinal arthroplasty system according to claim 10 , wherein said partial intervertebral disk prosthesis is constituted by an intervertebral disk nucleus prosthesis.
16 . A spinal arthroplasty system according to claim 10 , wherein said intervertebral spacer comprises two ends, each including one of said housings, and a middle portion including means deformable in compression that are active when the two vertebrae move towards each other, and tie means for limiting the extent to which the ends of said spacer can move apart under the effect of mutual separation movements between the vertebrae.
17 . A spinal arthroplasty system according to claim 10 , wherein said intervertebral spacer comprises two ends, each having one of said housings, and a middle portion having a coefficient of elasticity that is greater than that of said ends.
18 . A spinal arthroplasty system according to claim 17 , wherein said spacer is made out of a single material and its middle portion includes recesses passing right through it.