Acetabular cup assembly

US5049158A · kind A · utility

Assignee

• Boehringer Mannheim GmbH · DE

Inventors

• John A. Engelhardt · Warsaw, US
• Jon C. Serbousek · Warsaw, US
• C. Wayne Allen · Memphis, US
• Alex Dinello · Palo Alto, US
• Jeff Ondrla · Leesburg, US
• Duane G. Snyder · Warsaw, US

Key dates

• Filing date: Apr 20, 1990
• Grant date: Sep 17, 1991
• Expiry date: Apr 20, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/60
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A prosthetic acetabular cup assembly includes a single piece bearing component having an inner bearing surface for receiving a ball attached to a femoral prosthesis and an outer surface. The assembly also includes a shell component for attachment to an acetabulum to replace a natural hip socket includes an inner surface defining a cavity for receiving the bearing component therein. The inner surface of the shell component is formed to include an arcuate groove therein. A formed wire is situated in the arcuate groove of the shell component. The wire is configured so that a portion of the wire extends radially inwardly from the arcuate groove of the shell component to engage an arcuate groove formed in the bearing component to retain the bearing component inside the shell component. Anti-rotation lugs are formed on the inner surface of the shell component to cut into the outer surface of the bearing component as the bearing component is inserted into the shell component to prevent rotation of the bearing component relative to the shell component.