Composition for biomaterial; preparation process
US5717006A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1995 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Oct 10, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L27/46
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Composition for biomaterial for resorption/substitution of support tissues, dental tissues, bone tissues and osteoarticular tissues, which is made up of 40 to 75% by weight of a mineral phase comprising either a mixture of .beta. tricalcium phosphate (A) and hydroxyapatite (B), in a ratio A:B of between 20:80 and 70:30, or calcium titanium phosphate (Ca(Ti).sub.4 (PO.sub.4).sub.6) (C), and 60 to 25% by weight of a liquid phase comprising an aqueous solution of a polymer derived from cellulose. The mineral phase is a powder with a particle size 80 to 200 .mu.m in diameter. Preferably, the liquid phase is hydroxypropyl cellulose, and the concentration of the polymer in the liquid phase is from 0.5 to 4% by weight. The composition is prepared by mixing the mineral phase and the polymer of the liquid phase in an aqueous solution of defined viscosity, and sterilizing the liquid composition thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.