04759769 is referenced by 827 patents and cites 4 patents.

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 adjacent 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 members together.

Title
Artificial spinal disc
Application Number
7/64621
Publication Number
4759769
Application Date
June 22, 1987
Publication Date
July 26, 1988
Inventor
Brian E Maki
Islington
CA
Geoffrey R Fernie
Islington
CA
John P Kostuik
Toronto
CA
Thomas P Hedman
Toronto
CA
Agent
Rogers Bereskin & Parr
Assignee
Health & Research Services
CA
IPC
A61F 2/44
View Original Source