Invention Grant
US08998966B2 Polyaxial facet fixation screw system with fixation augmentation 有权
具有固定增强的多轴小面固定螺钉系统

Polyaxial facet fixation screw system with fixation augmentation
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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