INTERVERTEBRAL IMPLANT COMPONENT WITH THREE POINTS OF CONTACT
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United States of America Patent
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Issued Date -
Sep 18, 2008
app pub date -
Mar 14, 2007
filing date -
Mar 14, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An intervertebral implant is made up of components which each have an inner surface and an outer surface which engages an adjacent vertebra and presents only three distinct points of contact with a cortical rim of the vertebra. Preferably, the outer surface has a footprint which is sized to be within that of the cortical rim. In disclosed embodiments, the footprint can be convexo-concave shaped, D shaped, or kidney shaped. The intervertebral implant can be provided with upper and lower (or first and second) components which engage adjacent first and second vertebrae and which move relative to one another. The implant has both the first and second outer surfaces sized to present a respective footprint sufficient for two lateral-anterior and one posterior points of contact with an adjacent cortical rim of the respective first and second vertebra.
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