Anti-splay medical implant closure with multi-surface removal aperture
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United States of America Patent
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-
Oct 9, 2012
Grant Date -
Sep 2, 2004
app pub date -
Feb 20, 2004
filing date -
Sep 6, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An anti-splay closure with a multi-surfaced aperture, such as a multi-lobular socket, includes a cylindrical body with an external, continuous, helically extending anti-splay guide and advancement flange and a breakaway installation head. The multi-lobular socket includes a plurality of circumferentially spaced lobes extending parallel to a closure axis of the plug and which circumferentially alternate with spline receiving grooves extending parallel to the closure axis. The closure is used with an open headed bone implant screw having arms that are provided with internal, helically extending mating guide and advancement structures complementary to the body flange to allow slidable mating with the body upon rotation thereof and radial interlocking between the arms and the body.
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