Early stages of calcium-phosphate layer formation in bioglasses

摘要: Abstract Bioglasses with and without fluoride have been shown to be surface-active biomaterials. In the present in-vitro work, apatite formation on surface of Bioglass® non-fluoride is studied at early stages reaction. Fourier transform infrared reflection spectroscopy (FT-IRRS) analysis used monitor apatite-layer silica-rich-layer surfaces after they are reacted in a tris-buffer solution. Ion concentrations solutions, elemental depth profiles obtained by induced coupled plasma atomic emission spectrometry (ICP) Auger electron (AES) respectively. At very stage reaction, SiO bonds one non-bridging oxygen SiOSi bridging produced silica-rich layer. Simultaneously, an amorphous calcium-phosphate layer forms crystallizes 2 h Fluorine ions incorporated within crystals Bioglass®. The release rates for Na Ca higher HPO 4 2− was found reaction layers, but not non-fluorid when up 120 h.