Polyaxial locking interface
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United States of America Patent
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Aug 2, 2016
Grant Date -
Sep 18, 2014
app pub date -
Nov 8, 2013
filing date -
Mar 14, 2013
priority date (Note) -
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Abstract
An interlocking interface retains a screw head in a socket to prevent migration of the screw head out of the socket, or to lock the screw head in the socket. The interlocking interface may retain or lock the screw at various polyaxial angles with respect to the socket. The screw head includes external corrugations. The socket includes an internal corrugated structure which interlocks with the external corrugations of the screw head when the screw is at various polyaxial angles with respect to the socket. A counterbore may be adjacent either or both ends of the socket.
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