Abstract
The aim of this study was the synthesis of hard and low-abrasive novel implant materials with built-in time-dependent antibacterial properties, which can be tailored by a well-defined time-dependent and finite release of metal ions. We were able to synthesize such smart implant surfaces employing ECR (electron cyclotron resonance)-plasma on typical titanium implant material by transforming a polymer film into diamond-like carbon (DLC) which contains metal nanoparticles as reservoirs for controlled metal ion release. We found that the amount of released antibacterial metal ions is a biexponential function of time with a high release rate during the first few hours followed by a decreased ion release rate within the following days. To describe our experimental findings, we developed a kinetic model assuming that both nanoparticles near the surface and nanoparticles in the DLC bulk contribute to the total amount of ions released with different time constants.
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ACKNOWLEDGMENTS
The authors like to thank the “Deutsche Forschungsgemeinschaft (DFG)” for the financial support of this research work in form of the “Erkenntnistransferprojekt Antibakterielle und abriebarme Beschichtung von Gleitflächen in orthopädischen Implantaten” and Aesculap AG Tuttlingen for providing required materials. CW likes to acknowledge funding by Nanosystems Initiative Munich (NIM).
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Buchegger, S., Vogel, C., Herrmann, R. et al. Antibacterial metal ion release from diamond-like carbon modified surfaces for novel multifunctional implant materials. Journal of Materials Research 31, 2571–2577 (2016). https://doi.org/10.1557/jmr.2016.275
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DOI: https://doi.org/10.1557/jmr.2016.275