Metal-backed UHMWPE rod sleeve system preserving spinal motion
First Claim
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1. A spinal rod sleeve system comprising a longitudinal spinal rod disposed within a concentric sleeve, said sleeve having an internal bearing layer and an external layer.
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Abstract
A spinal rod sleeve system comprises attachment anchors having a plastic (preferably UHMWPE) sleeve which at least partially encircles a spinal rod, so as to allow a vertebra to slide cephalad or caudad along the spinal rod sleeve system. Preferably, said sleeve has a metal backed exterior surface, said rod has a hard outer surface suitable for gliding within said sleeve. The system helps preserve range of motion following spinal surgery.
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Citations
18 Claims
- 1. A spinal rod sleeve system comprising a longitudinal spinal rod disposed within a concentric sleeve, said sleeve having an internal bearing layer and an external layer.
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16. A spinal rod for a spinal rod sleeve system comprising a longitudinal spinal rod having an inner core and an outer bearing surface, said inner core being comparatively hard in relation to said outer bearing surface, and said outer bearing surface being composed of UHMWPE.
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17. A spinal rod sleeve for a spinal rod sleeve system comprising a sleeve having an outer casing surface and an inner bearing surface, said outer casing surface being comparatively hard in relation to said inner bearing surface, and said inner bearing surface being composed of UHMWPE.
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18. A system for low friction arthroplasty, comprising a core disposed within a concentric sleeve which is harder than said core, so as to facilitate motion by articulation of said core with said concentric sleeve.
Specification