Helical guide and advancement flange with radially loaded lip
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United States of America Patent
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Oct 28, 2014
Grant Date -
Oct 17, 2013
app pub date -
Apr 29, 2013
filing date -
Sep 6, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A spinal fixation device combines an open-headed anchor member, such as a bone screw or a hook, with a closure member to thereby clamp a spinal fixation rod to the anchor member. The anchor member has spaced apart arms forming a rod receiving channel. The closure member and inner surfaces of the arms and tabs have helical anti-splay guide and advancement interlocking flanges formed thereon which cooperate to prevent splaying the arms and extensions as the closure member is advanced into the rod receiving channel.
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