Intervertebral disc prosthesis
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United States of America Patent
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-
Dec 8, 2009
Grant Date -
Mar 9, 2006
app pub date -
Sep 1, 2005
filing date -
Mar 24, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Intervertebral disc prosthesis including an upper apposition plate appropriate to rest against the base plate of an upper vertebra, a lower apposition plate spaced apart from the upper apposition plate and suitable to rest against the base plate of a lower vertebra, a plurality of elastic devices mounted between the two apposition plates and in their peripheral zones in a manner that the two apposition plates shall be displaceable in mutually resilient manner, and a central axis which runs essentially perpendicularly to the two apposition plates, the elastic devices being designed/configured in a manner that the intervertebral disc prosthesis as a whole exhibits asymmetrical stiffness.
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