Dynamic stabilization devices and methods
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United States of America Patent
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Aug 9, 2011
Grant Date -
Jul 3, 2008
app pub date -
Dec 5, 2007
filing date -
Dec 5, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A dynamic stabilization device includes end caps that define a bore for receiving a corresponding bone screw therethrough. A spacer is engaged between each end cap and a cable passes through each of the components and is placed in tension to couple the spacer between the two end caps. The spacer is formed of a material that allows some flexible movement after implantation. An alternative stabilization device includes a spacer over-molded about two bushings defining the bores. According to a method of use, a stabilization device is passed along guide wires through a small incision. Once the device is in contact with the vertebrae, the bone screws are advanced along the guide wires and driven into the bone. One fastener bore may include a camming surface that causes distraction of the vertebrae as the bone screw is threaded into the vertebral bone.
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