The purpose of this study was to contribute to the understanding of the effect of titanium ions released from a metallic substrate on the molecular structure of hydroxyapatite. The effects of pH, time of incubation and concentration of titanium ions were investigated. The solids were analysed by X-ray diffraction, Fourier transform infrared spectroscopy, Fourier transform Raman spectroscopy, energy dispersive X-ray analysis and thermogravimetric analysis. The results clearly indicate the presence of a titanium phosphate, Ti(HPO4)2·nH2O (n=1–3), which probably has a double layered structure. The formation of this compound is dependent on the titanium concentration and its crystallinity increases with the time of incubation.
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Ribeiro, C.C., Barbosa, M.A., Machado, A.A.S.C. et al. Modifications in the molecular structure of hydroxyapatite induced by titanium ions. J Mater Sci: Mater Med 6, 829–834 (1995). https://doi.org/10.1007/BF00134326
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DOI: https://doi.org/10.1007/BF00134326