Artificial spinal disc
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United States of America Patent
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-
Jul 31, 2012
Grant Date -
Apr 7, 2011
app pub date -
Nov 15, 2010
filing date -
Jun 30, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An artificial disc prosthesis is provided. The prosthesis enables spinal segment alignment by having a variable height across its surface. The variable height is achieved by an asymmetric artificial nucleus or by at least one variable height end plate. The prosthesis may have a central keel on one end plate and an offset pair of keels on a second end plate. The nucleus may engage a slot or trough in an inner surface of an end plate. The trough can be open on the posterior or anterior end to allow the nucleus to slide into the trough without undue distraction of adjacent vertebrae. The nucleus can be prevented from moving out of the trough by inserting a stop in the trough.
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Family
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