Dynamic stabilization assembly having pre-compressed spacers with differential displacements
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United States of America Patent
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Feb 5, 2013
Issued Date -
N/A
app pub date -
Jul 1, 2009
filing date -
May 1, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A dynamic longitudinal connecting member assembly includes an anchor member having an integral or otherwise fixed elongate core extending through at least two elastic spacers and at least one outer sleeve or trolley. The anchor member and the outer sleeve each attach to at least one bone anchor. The spacers have differing durometers and/or geometries, resulting in greater axial movement of the sleeve in one direction than in an opposite direction. The spacers are compressed prior to attachment to the bone anchors.
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