Wound implant materials
US5766631A · kind A · utility
Inventor
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2250/0067
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Wound implant materials are described comprising a plurality of bioabsorbable microspheres bound together by a bioabsorbable matrix, such as in a freeze-dried collagen matrix. The microspheres preferably comprise over 30% of the volume of the material, and preferably have diameters of 10 .mu.m to 1500 .mu.m. The microspheres and/or the matrix preferably comprise a polylactic/polyglycolic copolymer, collagen, cross-linked collagen, hyaluronic acid, cross-linked hyaluronic acid, an alginate or a cellulose derivative. The resulting implants are stronger and more slowly resorbed than conventional collagen sponge implants. Better control over the porosity of the implant is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.