Zimmer Gmbh

Stiga S.p.a. in Breve Anche St. S.p.a.

Michael Forrer

Ines Baum

Nicole Gronau

Stefan Boss

Gian Luca Bacchin

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 ().

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Seuzach, Switzerland

Michael Forrer