Ann-Kathrin Meinshausen1, Maria Herbster1,2, Christoph Zwahr3, Marcos Soldera3, Andreas Müller4,5, Thorsten Halle2, Andrés Fabián Lasagni3,6, Jessica Bertrand1. 1. Department of Orthopedic Surgery, Otto-von-Guericke University, Magdeburg, Germany. 2. Institute of Materials and Joining Technology, Otto-von-Guericke University, Germany. 3. Chair of Large Area Laser Based Surface Structuring, Technische Universität Dresden, Germany. 4. Institute for Molecular and Clinical Immunology, Otto-von-Guericke University, Magdeburg, Germany. 5. Helmholtz Centre for Infection Research, Inhoffenstrasse 7, Braunschweig, 38124, Germany. 6. Fraunhofer Institute for Material and Beam Technology IWS, Dresden, Germany.
Abstract
AIMS: Joint infections cause premature implant failure. The avoidance of bacterial colonisation of implant materials by modification of the material surface is therefore the focus of current research. In this in vitro study the complex interaction of periodic structures on PET and titanium surfaces on the adhesion of Staphylococcus aureus is analysed. METHODS AND RESULTS: Using direct laser interference patterning as well as roll-to-roll hot embossing methods, structured periodic textures of different spatial distance were produced on surfaces and S. aureus were cultured for 24 hours on these. The amount of adhering bacteria was quantified using fluorescence microscopy and the local adhesion behaviour was investigated using scanning electron microscopy. For PET structures, minimal bacterial adhesion was identified for an aspect ratio of about 0.02. On titanium structures, S. aureus adhesion was significantly decreased for profile heights of < 200 nm. Our results show a significantly decreased bacterial adhesion for structures with an aspect ratio range of 0.02 to 0.05. CONCLUSIONS: We show that structuring on surfaces can decrease the amount of S. aureus on titanium and PET as common implant materials. SIGNIFICANCE AND IMPACT OF THE STUDY: The study highlights the immense potential of applying specific structures to implant materials to prevent implant colonization with pathogen bacteria. This article is protected by copyright. All rights reserved.
AIMS: Joint infections cause premature implant failure. The avoidance of bacterial colonisation of implant materials by modification of the material surface is therefore the focus of current research. In this in vitro study the complex interaction of periodic structures on PET and titanium surfaces on the adhesion of Staphylococcus aureus is analysed. METHODS AND RESULTS: Using direct laser interference patterning as well as roll-to-roll hot embossing methods, structured periodic textures of different spatial distance were produced on surfaces and S. aureus were cultured for 24 hours on these. The amount of adhering bacteria was quantified using fluorescence microscopy and the local adhesion behaviour was investigated using scanning electron microscopy. For PET structures, minimal bacterial adhesion was identified for an aspect ratio of about 0.02. On titanium structures, S. aureus adhesion was significantly decreased for profile heights of < 200 nm. Our results show a significantly decreased bacterial adhesion for structures with an aspect ratio range of 0.02 to 0.05. CONCLUSIONS: We show that structuring on surfaces can decrease the amount of S. aureus on titanium and PET as common implant materials. SIGNIFICANCE AND IMPACT OF THE STUDY: The study highlights the immense potential of applying specific structures to implant materials to prevent implant colonization with pathogen bacteria. This article is protected by copyright. All rights reserved.