Aspect ratio of nano/microstructures determines Staphylococcus aureus adhesion on PET and titanium surfaces

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • A-k Meinshausen - , Otto von Guericke University Magdeburg (Author)
  • M. Herbster - , Otto von Guericke University Magdeburg (Author)
  • C. Zwahr - , Chair of Laser-based Manufacturing (Author)
  • M. Soldera - , Chair of Laser-based Manufacturing (Author)
  • A. Mueller - , Otto von Guericke University Magdeburg, Helmholtz Centre for Infection Research (Author)
  • T. Halle - , Otto von Guericke University Magdeburg (Author)
  • A. F. Lasagni - , Chair of Laser-based Manufacturing, Fraunhofer Institute for Material and Beam Technology (Author)
  • Jessica Bertrand - , Otto von Guericke University Magdeburg (Author)

Abstract

Aims: Joint infections cause premature implant failure. The avoidance of bacterial colonization 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 h 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.

Details

Original languageEnglish
Pages (from-to)1498-1514
Number of pages17
JournalJournal of applied microbiology
Volume131
Issue number3
Early online dateMar 2021
Publication statusPublished - Sept 2021
Peer-reviewedYes

External IDs

PubMed 33565669
Scopus 85102251878

Keywords

Keywords

  • Aspect ratio, Aureus, Orthopaedic implant, Periprosthetic joint infection, Pet, S, Structures, Titanium