Polyaxial bone screw with compound articulation
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United States of America Patent
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-
Jan 13, 2009
Grant Date -
Nov 30, 2006
app pub date -
May 10, 2005
filing date -
May 10, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a receiver and a retainer having spherical inner and outer surfaces. The retainer is compressible, having an opening with two ends that may be pressed toward one another. The retainer spherical surfaces slidingly mate with both the receiver and the capture structure, providing multiple or compound polyaxial articulation.
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