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Silver and copper addition enhances the antimicrobial activity of calcium hydroxide coatings on titanium

  • Biomaterials Synthesis and Characterization
  • Original Research
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Abstract

Electrochemically assisted deposition of Ca(OH)2 (Portlandite) coatings on titanium surfaces has been proven as a promising method to provide the substrate with a most desirable combination of significant bacterial growth reduction on one hand and good biocompatibility on the other. Due to the rapid in vivo transformation of Ca(OH)2 to hydroxyapatite, the antimicrobial activity will be an ephemeral property of the coating when implanted into the human body. In this study, the ability to reduce bacterial growth of such portlandite coatings was significantly enhanced by an ionic modification with copper and silver ions. Antibacterial tests revealed a noticeably elevated reduction of bacterial growth, especially for copper and even at a relatively low copper content of about 0.3 wt.%. In addition, the cytocompatibility, a crucial prerequisite for potential in vivo biocompatibility, of the copper-modified coating was comparable to pure calcium hydroxide coatings.

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Acknowledgements

We gratefully acknowledge financial support by the DFG State Major Instrumentation Programme, funding the crossbeam scanning electron microscope Zeiss CB 340 (INST 105022/58-1 FUGG).

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    Authors and Affiliations

    1. Department for Functional Materials in Medicine and Dentistry, School of Dentistry, University of Würzburg, Pleicherwall 2, D-97070, Würzburg, Germany

      M. Meininger, S. Meininger, J. Groll & U. Gbureck

    2. Institute for Biomedical Engineering (IBMT), University of Applied Sciences Mittelhessen (THM), Wiesenstraße 14, D-35390, Gießen, Germany

      C. Moseke

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    These authors contributed equally: U. Gbureck and C. Moseke.

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    Meininger, M., Meininger, S., Groll, J. et al. Silver and copper addition enhances the antimicrobial activity of calcium hydroxide coatings on titanium. J Mater Sci: Mater Med 29, 61 (2018). https://doi.org/10.1007/s10856-018-6065-1

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