Evolution of porosity during in vitro hydroxycarbonate apatite growth in sol-gel glasses.
A bioactive glass of composition (mol %) SiO(2) 58, CaO 36, P(2)O(5) 6 was obtained using the sol-gel method. Changes in porosity during the growth of a hydroxycarbonate apatite (HCA) phase were studied at different stages of the process. The high Ca (II) content led to a higher degree of porosity and enhancement of Ca(2+) released from surface and bulk when the glass was soaked into simulated body fluid (SBF). Saturation of the media (SBF) together with the porosity of the material led to fast growth of HCA on the surface and into the pores.
Vallet-Regí
M
M
Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain.
Arcos
D
D
Pérez-Pariente
J
J
D001031:Apatites / Q000737:chemistry; D001672:Biocompatible Materials; D001826:Body Fluids; D002118:Calcium / Q000737:chemistry; D002254:Carbonates; D005898:Glass; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
D001031:Apatites; D001672:Biocompatible Materials; D002254:Carbonates; C413465:hydroxycarbonate apatite; D002118:Calcium