Variable angle spinal screw assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 27, 2008
Grant Date -
Nov 25, 2004
app pub date -
May 19, 2004
filing date -
May 22, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A spinal screw assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion and a tool engagement surface in the head portion for use in driving the screw into a vertebrae. The head portion of the screw is positioned in a body member adjacent a curvilinear surface disposed about an aperture in the end of the body member such that the shaft portion of the screw extends therethrough and the curvilinear inner surface abuts and mates with the head portion of the screw so as to define a ball joint therewith. The body member additionally defines a pair of opposed parallel slots therein adapted to receive a portion of the fixation rod and a locking cap bears against the fixation rod to releasably secure the rod within the assembly.
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