We formed micropores on the surface of a carbon fiber reinforced polyetheretherketone (CFR-PEEK) and a glass fiber reinforced polyetheretherketone (GFR-PEEK) by immersing in sulfuric acid. In order to provide bioactivity to the CFR-PEEK and the GFR-PEEK, we treated the surfaces of the specimens with glow-discharge in oxygen gas atmosphere and precipitated apatite nuclei in the micropores. We evaluated apatite-forming ability of the specimens by using SBF and measured adhesive strength of formed apatite layer.
Micropores were formed on the surfaces of Zirconium (Zr) and Ti-6Al-4V alloy plates by soaking in sulfuric acid. In order to provide bioactivity to these metals, Apatite Nuclei (AN) were precipitated in the pores. By soaking in SBF, it was observed that the whole surfaces of Zr and Ti-6Al-4V alloy with the AN treatment were covered with the bone-like apatite within 1 day. The formed apatite layer showed high adhesive strength by a mechanical interlocking effect.
We immersed micropores-formed glass fiber reinforced polyamide MXD6 (GFR-MXD6) in SBF and precipitated apatite nuclei in the pores of the substrate by raising both the pH and the temperature of SBF and obtained bioactive GFR-MXD6. By immersing in SBF, hydroxyapatite formation was induced by the apatite nuclei in the pores and grew to the surface of the substrate. High adhesive strength between the formed hydroxyapatite and the substrate was obtained by a mechanical interlocking effect.
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