Fastening means for hip joint prosthesis sockets
AssigneeFriedrichsfeld GmbH. Steinzeug-und Kunststoffwerke
InventorsGunther Heimke, Peter Griss, Hanns Von Andrian-Werburg, Herbert Heil, Paul Wachter
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Abstract
A socket for hip joint prosthesis is secured to a cavity in the bone tissue by a series of radially arranged pegs which can be projected outwardly from the wall of the socket into the surrounding tissue by a central screw member which also has a self-tapping thread which also enters the tissue.
Claims5
A socket for hip joint prosthesis for cement free implantation comprising a body of biologically inert material provided with a semi-spherical concentric bearing cavity, a series of pegs longitudinally slidably mounted in said body in space relation to each other, a threaded screw mounted for axial movement in a concentric bore provided in said body for operative engagement with one end of each of said pegs, the threads being disposed on one end of the screw for self-tapping engagement with the tissue of the bone, a portion of the screw remote from said one end being of larger diameter than the threaded portion to define an annular shoulder, said bore having a portion of reduced diameter defining an annular shoulder for engagement with the first mentioned shoulder for assisting in holding the body in place.
Dependencies are inferred from the claim text.