MODIFICATION OF CALCIUM PHOSPHATE FOAM CERAMICS WITH BIOAPATITE IN SBF SOLUTION

Abstract

The multiphase calcium phosphate foam ceramics, represented by β-tricalcium phosphate (65%) and β-calcium pyrophosphate (25%), including hydroxyapatite (5%) and α-tricalcium phosphate (5%), with 60-64% porosity and a through architecture of polyurethane foam was obtained. The application of a layer of hydroxyapatite led to an increase in the content of hydroxyapatite to 25%, α-tricalcium phosphate to 40%, and an increase in static strength to 0,03 MPa with a decrease in porosity to 49%. The application of the second layer of hydroxyapatite promoted an increase in the content of hydroxyapatite to 40%, the static strength reached 0,05 MPa at a porosity 40%. The bioapatite formation in the shape of «foam spheres» with a size from 2 to 10 μm occurred in the process of modifying all types of foam ceramics in a SBF solution during 21-28 days. The modified calcium phosphate foam ceramics enriched with α-tricalcium phosphate and hydroxyapatite, was characterized by the maximum static strength 0,08 MPa at a porosity 38%.

Keywords

• calcium phosphate foam ceramics
• hydroxyapatite
• polyurethane foam
• tricalcium phosphate
• sbf (simulated body fluid)
• bioapatite