Ceramtec Gmbh

Synthes Gmbh

Roman Preuss

Meinhard Kuntz

Thomas Pandorf

Patricie Merkert

Martin Dietrich

Heinrich Wecker

Paul Silberer

Tobias Weiss

Lukas Gottwik

Götz Griesmayr

Manuela Muhr-Schenk

Michael Kuntz

Norbert Schneider

Ralph Autenrieth

Thomas Kilchenmann

Heike Wolf

Heike Idink

Matthias Grassel

Christine Niess

Alessandro Alan Porporati

Marita Raschke

Robert Streicher

Peter Strötgen

Yvonne Bläske

Goetz Griesmayr

Professor Robert Streicher

Thomas BÖGEL

Matthias GRÄSSEL

The invention relates to an acetabular cup () and a cup insert () for a hip joint prosthesis (), wherein the cup insert () is coupled to the acetabular cup by means of a clamping cone () of a conical clamping device in the equatorial region () of the two components () and, in the unloaded state of the cup insert (), a gap () is provided between the two components () below the clamping cone () to the pole (), said gap being delimited by the radial contours of the two components (). In order to reduce the tensile stresses in the cup insert, the radial contours of the two components () have identical geometric elements in the same order, starling front the lower cone end () to the pole (), and tangential or substantially tangential transitions exist between the geometric elements.

Increasing the breaking load of ceramic cup inserts for hip joint prostheses by a defined back side collision of the cup insert and acetabular cup

A package for receiving an adapter sleeve for a hip endoprosthesis, the hip endoprosthesis comprising a ball head which has to be pushed onto the adapter sleeve with a defined pushing-on force. For simplification and secure fastening of the ball head on the adapter sleeve, it is proposed according to the invention that a device for the mounting of the ball head on the adapter sleeve is integrated in the package and this device comprises indicating elements which indicate that the defined pushing-on force has been reached when the ball head is pressed onto the adapter sleeve. Preferably the package has indicating elements.

Device for assembly of ball heads and adapter sleeves as integrated component part of the package

The invention relates to a package for receiving an adapter sleeve for a hip endoprosthesis, the hip endoprosthesis comprising a ball head which has to be pushed onto the adapter sleeve with a defined pushing-on force. For simplification and secure fastening of the ball head on the adapter sleeve, it is proposed according to the invention that a device for the mounting of the ball head on the adapter sleeve is integrated in the package and this device comprises indicating elements which indicate that the defined pushing-on force has been reached when the ball head is pressed onto the adapter sleeve.

An insertion instrument for hip endoprosthetics for inserting socket inserts into endoprosthetic hip sockets having holding claws which are connected to a substantially ring-shaped support element through spring elements, wherein the insertion instrument can be placed on the socket insert and can be connected to said socket insert through the holding claws. In order for the user to receive direct palpatory information about the events in the operation areas and to not suffer a perceived loss of control, it is proposed that the support element surround a freely accessible, substantially circular effective insertion area, the center point of which is located on the longitudinal axis of the insertion instrument.

Insertion instrument for inserting socket inserts into the spherical recesses of hip sockets

An insertion instrument for instrumented insertion of a socket inset () with a spherical cap () into a hip socket () of a hip-joint prosthesis, having an impacting instrument () with a handle (), at one end of which a holding tool for the socket inset () is located. In order to avoid tilting of the socket inset during insertion, it is proposed that the one end () of the impacting instrument () has a spherical shape and is part of the holding tool, and the holding tool furthermore comprises an impacting head (), which is designed as a separate component and received the spherical end () of the impacting instrument () in an articulated manner, and an insertion aid (), which is designed as a separate component and serves to hold the socket inset () on the outer geometry of the impacting head (), and the impacting head () can be connected to the spherical end () to form a ball joint.

Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses

An intervertebral disc endoprosthesis for implantation in the spinal column, with an upper end plate and a lower end plate for securing respectively to the bones of the vertebral body, and with a slide bearing which is arranged between the end plates and is composed of slide bodies that are designed to slide on each other. both end plates are made of plastic and the slide bodies are made of ceramic, the slide bodies are encapsulated by the plastic of the end plates and the surface areas of the slide bodies encapsulated by the plastic of the end plates have surface area enlargements by comparison with flat surfaces. To ensure that the slide bodies are connected fixedly to the end plates in a manner secure against twisting, it is proposed that the surface area enlargements are elevations or depressions on the slide bodies.

Intervertebral disc endoprosthesis

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.

Asymmetric formation of sockets and/or socket inserts for the manipulation and supression of natural frequencies

A hip socket for use in a hip joint prosthesis comprising a shaft on which a ball head may be fixed, the ball head may be rotatably inserted in a socket insert and the socket insert may be inserted and fixed in the hip socket the shaft and the hip socket being implantable in the thigh bone and the pelvic bone respectively. Damages to the socket insert and/or limitation of the function of the sliding pair of ball head/socket insert may be avoided by local reduction of the calotte diameter of the socket insert, such that the hip socket has an asymmetrical design with regard to the stiffness and/or geometry thereof in two different directions (x, y) orthogonal to each other and to the symmetry axis (z) of the hip socket.

Asymmetric design of hip socket for reducing socket deformations

A socket insert of a hip joint prosthesis having a spherical-indentation-shaped recess in which a spherical head of a femur is mounted. The spherical indentation has a run-in zone which ends on one side with a circular arc tangentially in an end face of the socket insert and extends on another side as far as the run-in edge. Between a start of the circular arc with a radius of the length (R) and the run-in edge of the spherical indentation with the radius of the length (R) the run-in zone forms a curve, the function of which is continuously differentiated twice at every point.

Reduction of the development of stripe wear on inserts for hip joint prostheses by modifying the geometry of the transition between the face and spherical recess

A hip joint prosthesis with a shaft fastened on the shaft head of which there is a ball head which in turn is inserted in a rotatable manner in the spherical recess of a socket insert and the socket insert is coupled with a hip socket wherein the shaft can be implanted in the femur and the hip socket can be implanted in the pelvic bone. To avoid transmission of vibrations, damping elements of a vibration-damping material are arranged at the coupling points of the shaft head with the ball head and/or of the socket insert with the hip socket.

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Leinf.-Echterdingen, Germany

Roman Preuss