Joint endoprosthesis

US4932969A · kind A · utility

Assignee

• Sulzer Brothers Limited · CH

Inventors

• Otto Frey · Winterthur, CH
• Rudolf Koch · Oberhaching, DE
• Heinrich Planck · Ratingen, DE

Key dates

• Filing date: Dec 17, 1987
• Grant date: Jun 12, 1990
• Expiry date: Dec 17, 2007

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2310/00407
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The joint endoprosthesis is formed of a compressible elastic hollow body which is disposed between two anchoring elements. The hollow body defines a closed cavity which is filled with an incompressible fluid medium. Compressive loadings near the edges of the endoprosthesis cause a displacement of the liquid into relieved regions of the prosthesis so as to avoid tensile forces from occurring in the anchoring of the prosthesis to the bones.