Coated load bearing surface for a prosthetic joint
US5865850A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Mar 10, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00568
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthetic hip joint includes a ceramic hip head having a bore which defines a surface, wherein the bore surface has a layer of malleable material disposed on at least a portion thereof. The surface of the bore includes surface imperfections in the form of peaks and valleys. The prosthetic hip joint can also include a femoral component having a trunnion with a tapered surface adapted for friction fit insertion into the bore of the hip head. The layer of material, such as pure titanium, distributes a load on the joint reducing localized stress points produced by opposing asperity peaks in the load-bearing surfaces of the bore and trunnion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.