Asymmetric formation of sockets and/or socket inserts for the manipulation and supression of natural frequencies
AssigneeCeramTec GmbH
InventorsRoman Preuss, Thomas Pandorf, Patricie Merkert, Heike Idink, Martin Dietrich
Life of this patent
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Abstract
A socket or socket insert for a hip joint prosthesis, the shaft of which can be coupled with a ball head which in turn can be inserted in a rotatable manner in the hemispherical recess of the socket insert wherein the shaft can be implanted in the femur and the socket insert can be implanted directly or via a hip socket in the pelvic bone. To avoid squeaking, the socket and/or the socket insert are asymmetrically in their inner or outer geometries.
Claims23
A socket and socket insert for a hip-joint prosthesis, wherein the socket and the socket insert are formed asymmetrically in at least one of outer or inner geometries or a material composition thereof, wherein a partial element of material with differing rigidity and damping properties from those of the existing socket and socket insert is arranged in said socket and socket insert, wherein the socket insert has a hemispherical recess therein for receiving a ball head;
- wherein a partial element of material with differing rigidity and damping properties from those of the existing socket and the socket insert is arranged within the existing geometry of the socket.
A socket for a hip-joint prosthesis, wherein said socket is formed asymmetrically in at least one of an outer geometry, inner geometry or material composition thereof, wherein the socket has a socket axis, wherein said hip-joint prosthesis has a socket insert and a shaft that can be coupled with a ball head, wherein the ball head can be inserted in a rotatable manner in the hemispherical recess of a socket insert, wherein the shaft can be implanted into a femur, and the socket insert can be implanted directly or by way of a hip socket into a pelvic bone;
- wherein the partial element of material with differing rigidity and damping properties from those of the existing socket and the socket insert is arranged within the existing geometry of the socket.
A socket insert for a hip-joint prosthesis, wherein the socket insert is formed asymmetrically in at least one of an outer geometry, inner geometry or material composition thereof, wherein a partial element of material with differing rigidity and damping properties from those of the existing socket is arranged in the outer geometry of said socket insert, wherein the socket insert has a socket insert axis, a shaft that can be coupled with a ball head, wherein the ball head can be inserted in a rotatable manner in the hemispherical recess of the socket insert, wherein the shaft can be implanted into a femur, and the socket insert can be implanted directly or by way of a hip socket into a pelvic bone.
An assembly for a hip-joint prosthesis comprising:
- a socket;
- and
- a socket insert;
- wherein the socket and the socket insert are formed asymmetrically in at least one of outer or inner geometries or a material composition thereof;
- wherein a partial element of material with differing rigidity and damping properties from those of the existing socket and the socket insert is arranged within the existing geometry of the socket or the socket insert;
- wherein the socket insert has a hemispherical recess therein for receiving a ball head.
A socket insert for a hip-joint prosthesis, wherein the socket insert is formed asymmetrically in at least one of an outer geometry, inner geometry or material composition thereof, wherein a partial element of material with differing rigidity and damping properties from those of the existing socket is arranged in the inner geometry of said socket insert, wherein the socket insert has a socket insert axis, a shaft that can be coupled with a ball head, wherein the ball head can be inserted in a rotatable manner in the hemispherical recess of the socket insert, wherein the shaft can be implanted into a femur, and the socket insert can be implanted directly or by way of a hip socket into a pelvic bone.
Dependencies are inferred from the claim text.