Polyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
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United States of America Patent
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Apr 15, 2014
Grant Date -
Nov 29, 2012
app pub date -
Jul 30, 2012
filing date -
Sep 30, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A medical implant assembly includes a polyaxial bone anchor having a shank, a receiver, a lower compression insert with planar surfaces for closely receiving an elongate connecting member with planar surfaces and a one-piece closure structure. The connecting member is made from a polymer. The closure structure engages both the connecting member and the insert with the engagement between the closure structure and the insert securely locking the polyaxial mechanism even if the connecting member exhibits creep.
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Family
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