Mounting mechanisms for pedicle screws and related assemblies
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United States of America Patent
Stats
-
Nov 10, 2009
Grant Date -
Aug 11, 2005
app pub date -
Dec 31, 2004
filing date -
May 2, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pedicle screw is provided that includes an upwardly extending collet. The collet may include downwardly extending slots that define deflectable segments therebetween. When a spherical element or other structure, e.g., a non-dynamic stabilizing element, is positioned around the collet, introduction of a set screw causes outward deflection of the upstanding segments into engagement with the spherical element. A snap ring may be interposed between the collet and the spherical element to facilitate positioning therebetween. In an alternative embodiment, a non-slotted collet is employed. In such embodiment, the collet and the spherical element may be threadingly engaged and may include a snap ring therebetween. The pedicle screw subassemblies may be incorporated into a spinal stabilization system which may include a dynamic stabilizing member to provide clinically efficacious results.
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