Polyaxial screw assembly
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United States of America Patent
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Mar 26, 2013
Grant Date -
Aug 25, 2011
app pub date -
Oct 22, 2008
filing date -
Oct 23, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A polyaxial screw assembly includes a pedicle screw, a coupling, an insert, and a housing. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The coupling is positioned on top the pedicle screw and releasably engages portions of the head. The coupling and pedicle screw are positioned within a distal portion of the housing. The pedicle screw is slid through an opening in the insert and the insert is thread into the distal portion of the housing to retain the coupling and the pedicle screw within the housing. The pedicle screw is rotatable and pivotable relative to the housing. Compressing the coupling within the housing locks the pedicle screw in a desired orientation.
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