04309777 is referenced by 720 patents and cites 6 patents.

An artificial intervertebral disc for implantation in the disc space after the removal of a diseased or damaged cervical intervertebral is described and comprises upper and lower disc portions having a plurality of springs positioned therebetween to yieldably urge the disc portions away from each other. A plurality of spikes extend upwardly from the upper disc portion for engagement with the vertebra thereabove. A plurality of spikes extend downwardly from the lower end of the lower disc portion for engagement with the vertebra therebelow.

Title
Artificial intervertebral disc
Application Number
6/206564
Publication Number
4309777
Application Date
November 13, 1980
Publication Date
January 12, 1982
Inventor
Arun A Patil
1011 Valley View Dr., Minot, 58701
ND, US
Agent
Zarley McKee Thomte Voorhees & Sease
IPC
A61F 1/24
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