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Surface activation of polyetheretherketone (PEEK) and formation of calcium phosphate coatings by precipitation

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Abstract

Plasma activation of polyetheretherketone (PEEK) surfaces and the influence on coating formation in a supersaturated calcium phosphate solution was investigated in this study. It was observed that plasma treatment in a N2/O2 plasma had a significant effect on the wettability of the PEEK surface. The contact angle decreased from 85° to 25° after plasma treatment. Cell culture testing with osteoblastic cell lines showed plasma activation not to be disadvantageous to cell viability. X-ray photoelectron spectroscopy (XPS) analysis was performed to characterize the chemical composition of the PEEK surfaces. It was observed that the O1s intensity increased with plasma activation time. At the C1s peak the appearance of a shoulder at higher binding energies was observed. Coating of PEEK was performed in a supersaturated calcium phosphate solution. Coating thicknesses of up to 50 μm were achieved after 24 days of immersion. Plasma activation followed by nucleation in a highly saturated hydroxyapatite solution had a positive effect on the growth rate of the layer on PEEK. Chemical analysis revealed that the coating consists of a carbonate-containing calcium phosphate.

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Authors and Affiliations

  1. Chair of Biocompatible Materials Science and Engineering, Department of Materials, ETH Zurich, Wagistr. 23, 8952, Schlieren, Switzerland

    S.-W HA , M KIRCH , F BIRCHLER , K.-L ECKERT , J MAYER  & E WINTERMANTEL

  2. Laboratory of Surface Science and Technology, Department of Materials, ETH Zurich, 8092, Zurich, Switzerland

    C SITTIG , I PFUND-KLINGENFUSS  & M TEXTOR

  3. Swiss Federal Laboratories for Materials Testing and Research (EMPA), 8600, Dubendorf, Switzerland

    N.D SPENCER , M GUECHEVA  & H VONMONT

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  1. S.-W HA
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  2. M KIRCH
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  3. F BIRCHLER
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  4. K.-L ECKERT
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  5. J MAYER
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  6. E WINTERMANTEL
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  7. C SITTIG
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  8. I PFUND-KLINGENFUSS
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  9. M TEXTOR
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  11. M GUECHEVA
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HA , SW., KIRCH , M., BIRCHLER , F. et al. Surface activation of polyetheretherketone (PEEK) and formation of calcium phosphate coatings by precipitation. Journal of Materials Science: Materials in Medicine 8, 683–690 (1997). https://doi.org/10.1023/A:1018535923173

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  • DOI: https://doi.org/10.1023/A:1018535923173

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