Biomedical materials
US8758500B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 11, 2008 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | May 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/322
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a process for the preparation of a silicate and carbonate co-substituted calcium phosphate material. The process comprises the steps of: forming a silicon and optionally carbon-containing calcium phosphate precipitate by an aqueous precipitation method involving preparing an aqueous solution comprising phosphate ions, silicate ions, calcium ions and optionally carbonate ions, wherein the ratio of Ca/P and of Ca/(P+Si) in the solution is maintained above approximately 1.67; and heating the precipitate in an atmosphere comprising carbon and oxygen to form a silicate and carbonate co-substituted calcium phosphate material. The present invention also provides a synthetic carbonate and silicate co-substituted hydroxyapatite material, as well as a biomedical material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.