Hydrothermal method for preparing calcium phosphate monoliths
AUTOR(ES)
García Carrodeguas, Raúl, Morejón Alonso, Loreley, García-Menocal, José Angel Delgado, Morejón Alonso, Lizette, Ginebra Molins, María Pau, Martínez Manent, Salvador, Gil Mur, Javier, Toledo Pérez, Jorge, Planell Estany, José Antonio
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2003-06
RESUMO
A new hydrothermal route for preparing biphasic calcium phosphate monoliths is proposed. Firstly, a slurry of beta-tricalcium phosphate/ortho-phosphoric acid (b-TCP/H3PO4) is cast into the desired final shape and size to obtain a block composed of dicalcium phosphate dihydrate (DCPD) and b-TCP. This block is then treated in 1.0 M Na2HPO4 at 60 °C in order to hydrolyze the DCPD into Ca10-x(HPO4)x(PO4) 6-x(OH)2-x (CDHA) and Ca8H2(PO4)6 .5H2O (OCP). The result is a monolithic piece which preserves the initial shape and size, but which is composed instead of CDHA, OCP, and b-TCP. During the initial stage, when the pH is slightly alkaline, the product of DCPD hydrolysis is CDHA. However, when a neutral or slightly acidic pH is reached OCP is formed. Test samples processed by this method showed complete conversion of DCPD into CDHA and OCP after 112 h of hydrolysis, and with a compressive strength of 16.2 MPa, similar to cancellous bone.
Documentos Relacionados
- Calcium phosphate biomaterials from marine algae. Hydrothermal synthesis and characterisation
- Low temperature method for the production of calcium phosphate fillers
- A general method for preparing intact nuclear DNA.
- Characterization of Calcium Phosphate Coating Produced by Biomimetic Method
- A Simple Method for Preparing Serial Blocks of Tissue