Endoprosthetic knee joint device
US5871542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1996 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/3895
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns endoprosthetic knee joint devices of the so called `meniscal knee`variety. A device is provided of the above type wherein the mutually engaging bearing surfaces of the tibial platform and the meniscal component have a part-cylindrical shaping to allow rotation therebetween about an antero-posterior axis, the superior bearing surface of the tibial platform preferably being convex. Movements of the natural joint can still be closely simulated and full congruency can be retained throughout the natural range of movement, but there is an additional degree of restraint at the tibio-meniscal interface. Unrestricted antero-posterior relative movement is allowed, as in the conventional meniscal knee, but the part-cylindrical interface shaping serves to reduce the risk of lateral or medial dislocation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.