Unrestrained elbow prosthesis
US4293963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1980 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Feb 14, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/3831
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The prosthesis disclosed is an unrestrained or hingeless elbow prosthesis including a humeral implant component and an ulnar implant component. The metal humeral component is comprised of an elongated stem with a substantially cylindrical articulating surface on the distal end of said stem wherein said cylindrical articulating surface is convex such that the diameters of the end surfaces of the cylindrical shape are smaller than the diameter about the midportion of the cylindrical shape. The ulnar component is comprised of a metal retainer and a polyethylene bearing. The metal retainer includes an elongated stem attached to a metal base such that the stem depends from the base and anatomically curves slightly outward or laterally from the base. The polyethylene bearing is slidably engaged to the metal retainer and locks into position on the retainer. The polyethylene bearing contains a concave cylindrical cavity for receiving the convex cylinder of the humeral component. The metal humeral component then rotates about the axis of its cylindrical articulating surface within the cavity of the polyethylene ulnar bearing of the ulnar component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.