Polyaxial locking interface

摘要

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.

主权项

1. A locking connection comprising:
a polygonal socket comprising internal corrugations, wherein the polygonal socket comprises a plurality of sides and a corresponding plurality of corners, wherein the sides bulge toward an interior of the socket; and a head received in the socket, the head comprising external corrugations; wherein the external corrugations engage the internal corrugations at any of a plurality of orientations of the head relative to the socket.