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Polyaxial bone screw assembly with fixed retaining structure
专利权人:
Roger P. Jackson
发明人:
Roger P. Jackson
申请号:
US11474577
公开号:
US08366753B2
申请日:
2006.06.26
申请国别(地区):
US
年份:
2013
代理人:
摘要:
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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中国工程科技知识中心
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