Polyaxial facet fixation screw system with fixation augmentation
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United States of America Patent
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Apr 7, 2015
Issued Date -
N/A
app pub date -
Jun 22, 2011
filing date -
Dec 1, 2009
priority date (Note) -
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Abstract
A screw system includes a screw and a washer assembly captive to the screw. The washer assembly is polyaxially pivotable relative to the screw. The screw may be freely rotated in one direction relative to the washer assembly, but frictionally binds with the washer assembly when rotated in a second direction. Various auxiliary fixation features are disclosed.
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