Artificial spinal disc

Details Artificial spinal disc Artificial spinal disc

A - Human Necessities

61

F

3/100

A61F 2/44 (2006.01) A61F 2/30 (2006.01)

Patent

CA 1283501

TITLE: ARTIFICIAL SPINAL DISC ABSTRACT OF THE DISCLOSURE An artificial disc for a human spine. The disc has upper and lower members hinged together at their rear portions and biased apart at their fronts by stiff coil springs. Rear stop surfaces limit the opening movement of the members. Vertically projecting tabs at the front and side of each member are rigidly screwed to the adja- cent vertebrae. Tolerances in the hinge allow limited side to side rocking. The disc and screws are made of titanium alloy or cobalt chrome alloy. In a modified version a hinge pin is replaced by cables tying the mem- bers together.

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