Metallic bearings for joint replacement
US7361194B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | May 12, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00029
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthopedic joint prosthesis comprising a first component having a soft metal bearing surface and a second component having a hard metal bearing surface. The soft metal bearing surface has a hardness of at least about 20 Rc, while the hard metal bearing surface having a hardness greater than the soft metal bearing surface by at least about 15 Rc. The soft and the hard metal bearing surfaces are configured to articulate with one another. The differential hardness of the hard metal bearing surface to the soft metal bearing surface is preferably at least about 1.5, and is preferably less than about 3. The hard metal bearing surface is preferably not more than about 40 Rc harder than the soft metal bearing surface. The hard metal bearing surface preferably has a hardness of between about 40 Rc and about 60 Rc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.