Press fit connection between prosthetic components of joint prostheses
AssigneeCeramtec AG Innovative Ceramic Engineering
InventorsHans-Georg Pfaff, Robert Rack, Paul Silberer, Wilfried Von Chamier
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Abstract
Joint prostheses, in which one joint partner is formed as a socket and the other joint partner is formed as a spherical head which is rotatably mounted in the socket, are known in particular as shoulder-joint and hip-joint prostheses. The force-fit connection, in particular conical jamming, is also used here as the connecting technique between metallic or ceramic spherical heads and the cone. A coupling element (6) is inserted between the cone (5) and the spherical head (3) of the force-fit connection (1). The elasticity and damping properties of the coupling element (6) can be predetermined by its porosity and the structure of its surface.
Claims14
A coupling element providing a force fit connection between prosthesis components of a joint prosthesis, in which the one prosthesis component is inserted into bone tissue and bears a cone on which a spherical head is placed that articulates another socket-shaped joint partner, the coupling element being provided between the cone and the spherical head for rendering a transfer of force uniform, the coupling element comprising a porous biocompatible material having a porosity and surface structure defining predetermined elasticity and damping properties.
Dependencies are inferred from the claim text.