Ion beam sensitizing of titanium surfaces to hydroxyapatite formation


Ion beam sensitizing of titanium surfaces to hydroxyapatite formation

Pham, M. T.; Matz, W.; Reuther, H.; Richter, E.; Steiner, G.; Oswald, S.

CaO and P2O5 containing Ti surfaces were prepared and examined for their bioactivity. The preparation involved the incorporation of Ca and P into Ti by ion implantation to a total dose of up to 8 x 1017 ions/cm² with a 1.7 Ca/P ratio and a subsequent oxidation at 500 °C in O2 for 40 min. The model surfaces were examined for their reactivity toward hydroxyapatite formation by microscopically recording the mineralization in a simulated body fluid. The ion implantation modified surfaces were shown to exhibit enhanced mineralization by inducing heterogeneous nucleation, growth, and proliferation of hydroxyapatite, relative to a control sample of pure Ti. The surface induced reactivity was shown to relate to the enhanced provision of the ionic mineral components Ca2+ and HPO42- directly supplied from the surface and the substrate-mediated nucleation by hydroxylated surface TiO2.

Keywords: biomaterials; ion implantation; surface coatings; Ti; hydroxyapatite

  • Contribution to proceedings
    Proceedings of the Eleventh International Conference on Surface Modification of Metals by Ion Beams (SMMIB'99), Sept. 19-14, 1999, Beijing, P.R. China.
  • Surface & Coatings Technology 128-129 (2000) 313-319

Permalink: https://www.hzdr.de/publications/Publ-2442
Publ.-Id: 2442