Polyaxial bone screw assembly with fixed retaining structure
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United States of America Patent
Stats
-
Feb 5, 2013
Grant Date -
Oct 26, 2006
app pub date -
Jun 26, 2006
filing date -
Jun 18, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver and retained within the receiver by a retaining structure in the form of an open ring. The receiver has a U-shaped channel for receiving a spinal fixation rod. The shank upper portion is designed to directly frictionally engage the spinal fixation rod when a closure structure operably urges the rod toward the upper portion, fixing the bone screw shank body in a selected angular orientation with respect to the receiver.
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