Polyaxial bone screw
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United States of America Patent
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Aug 8, 2006
Grant Date -
Dec 30, 2004
app pub date -
Jun 27, 2003
filing date -
Jun 27, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further includes an engagement member that is adapted to provide sufficient friction between the spherical head and the receiver member to enable the shank to be maintained in a desired angular orientation before locking the spherical head within the receiver member.
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