LOCKING CANNULATED BONE SCREW SYSTEM
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United States of America Patent
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N/A
Issued Date -
Oct 20, 2011
app pub date -
Nov 22, 2010
filing date -
Nov 20, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A cannulated bone screw having a cannula or lumen defined herein is disclosed. The screw may be fully or partially threaded and may have a cancellous thread form. Alternatively, the head of the screw may be generally flat on its undersurface. The screw head may further include an anti-backout feature to ensure good contact with the mating bone surface. The screw may further include an anti-rotation feature on the underside of the screw head. It is further disclosed that insertion and seating of the screw may be accomplished via locking engagement between jaws on the screw driver and a short raised feature on the head of the screw. The screws may be fully or partially threaded. A rescue screw is additionally disclosed.
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