06132465 is referenced by 397 patents and cites 26 patents.

A wedge-shaped prosthetic spinal disc nucleus including a hydrogel core surrounded by a constraining jacket. The hydrogel core is preshaped to form the wedge shape in a hydrated state. The constraining jacket is flexible, but substantially inelastic and is configured to prevent the hydrogel core from conforming to an anulus upon hydration. The prosthetic spinal disc nucleus corresponds generally to anatomical variations in disc space geometry, generally defined by separable areas or compartments, thus improving performance. In one preferred embodiment, the prosthetic spinal disc nucleus includes a radiopaque marker for indicating a location and orientation following implant.

Title
Tapered prosthetic spinal disc nucleus
Application Number
9/90820
Publication Number
6132465
Application Date
June 4, 1998
Publication Date
October 17, 2000
Inventor
Robert L Assell
Mendota Heights
MN, US
Charles D Ray
Williamsburg
VA, US
Agent
Dicke Billig & Czaja P A
Assignee
Raymedica
MN, US
IPC
A61F 2/44
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