Zimmer Gmbh

Sulzer Orthopedics Inc.

Ines Baum

Markus Rauscher

Peter Wendt

Nicole Gronau

Thomas Willi

Michael Forrer

Stefan Boss

The invention relates to a base platform () for an artificial joint, in particular for an artificial shoulder joint, wherein the platform can be anchored on the bone and serves as a support for an artificial joint component () that can be provided both in the form of a shell component () for an anatomical configuration and also in the form of a ball component () for an inverse configuration, and wherein different joint components can be mounted on the platform.

Base platform for an artificial joint

An insert () of a joint ball receptacle of a prosthetic shoulder joint according to the invention has a first side (I) with a depression () for receiving a joint ball, and a second side (II) which is provided and formed for being received in a shell () of the joint ball receptacle. According to the invention, a snap action mechanism () which extends around a central axis () of the insert () is arranged on the second side (II), which snap-action mechanism () has, as seen from the second side (II), and together with a collar (), an undercut () which extends around the central axis (), in such a way that the collar () can engage with elastic deformation behind a correspondingly formed mating element () of the shell (), wherein the snap-action mechanism () is discontinuous in the peripheral direction of the insert () at at least one point (); according to the invention, the insert () has a cylindrical guide region () at the outer periphery in the region provided for being received in the shell ().

Insert and shell of a joint ball receptacle

The invention relates to a ball draw-off apparatus for shaft prostheses with balls ( ) which can be placed onto the prosthesis neck ( ). The apparatus has two rotary bodies (5a, ) which are rotatably supported in a housing ( ), which can in each case be rotated with a lever arm ( ) and which with their axes of rotation ( ) lie in a common plane and form an open gap S in the projection onto the plane F for the introduction of the prosthesis neck ( ). The rotary bodies have a profile which with increasing rotation decreases the gap S for clamping the prosthesis neck ( ) and causes an increase of the distance of its upper edge ( ) from the plane F in order to produce a draw-off force P at the placed on ball directly or indirectly via an intermediate body.

Ball draw-off apparatus for shaft prostheses

Growing community of inventors

Bollschweil, Germany

Ines Baum