SPINAL IMPLANT WITH OFFSET KEELS
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United States of America Patent
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Issued Date -
Aug 23, 2007
app pub date -
Feb 17, 2006
filing date -
Feb 17, 2006
priority date (Note) -
Abandoned
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Abstract
An improved spinal implant includes vertically offset keels for mechanically interlocking respectively with overlying and underlying vertebral bone structures when implanted therebetween. At least one upper keel projects upwardly for close-fit reception into a prepared slot formed in the overlying vertebral structure, and at least one lower keel projects downwardly for similar close-fit reception into a prepared slot formed in the underlying vertebral structure. The upper and lower keels are misaligned or offset from each other to preclude creation of a common stress line extending therethrough, thereby significantly reducing risk of vertebral fracture.
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