04759766 is referenced by 663 patents and cites 2 patents.

An intervertebral disc endoprothesis comprises two symmetrical, concave end plates with an intermediate convex spacing piece. The end plates and the spacing piece have a plane guide rim. The end plates either have an edge shoulder or an annular groove for a toroid provided on the spacing piece. Alternatively, the intervertebral disc endoprothesis comprises two asymmetric end plates and a spacing piece, however, the two areas of movement are offset by 90.degree. in relation to each other and are partial surfaces of a cylinder. In the third variation, the two symmetrical end plates are convex, the spacing piece is cylindrical as well as concave at the two ends and has a durable cover.

Title
Intervertebral disc endoprosthesis
Application Number
767552
Publication Number
4759766
Application Date
September 9, 1987
Publication Date
July 26, 1988
Inventor
Roland Schumann
Dresden
DD
Kurt Schellnack
Berlin
DD
Hans Joachim Helisch
Berlin
DD
Klaus Peter Erkel
Dresden
DD
Bernd Derr
Berlin
DD
Karin Buettner Janz
Berlin
DD
Agent
Jordan and Hamburg
Assignee
Humboldt Universitaet zu Berlin
DD
IPC
A61F 2/44
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