Prosthesis formation having solid and porous polymeric components
US4454612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1981 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Aug 10, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A prosthesis having a porous polymeric coating over a non-porous polymeric substrate is disclosed. The porous polymeric coating is constructed by forming a mass of randomly arranged fibers of polymeric material in contact with a non-porous polymeric substrate of a compatible material. The entire prosthesis and mass of fibers is enclosed in a mold with interior dimensions conforming to the intended shape of the article. The mold is then subjected to an elevated temperature for sufficient time to sinter the fibers of the mass to each other and to the underlying substrate yet leave a pore volume of about 50%. The preformed material is ultra-high molecular weight polyethylene. Preferred sintering conditions are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.