POLYAXIAL BONE ANCHOR WITH HELICAL CAPTURE CONNECTION, INSERT AND DUAL LOCKING ASSEMBLY
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Jun 16, 2015
filing date -
Jun 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A medical implant assembly includes a polyaxial bone anchor having a shank, a receiver, a lower compression insert with surfaces for closely receiving an elongate connecting member and a dual closure structure that may include a single flange or helical flange. The dual closure structure independently engages the connecting member and the lower compression insert. A threaded capture connection of the bone anchor includes a shank upper surface exclusively engaging the lower compression insert and a retainer threadably attached to the shank and spaced from the upper surface, the retainer configured for polyaxial motion with respect to the receiver prior to locking.
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