Next Article in Journal
An Overview of the Experimental Studies on the Electrical Conductivity of Major Minerals in the Upper Mantle and Transition Zone
Previous Article in Journal
Damage Adaptive Titanium Alloy by in-Situ Elastic Gradual Mechanism
Previous Article in Special Issue
Nanotechnology Scaffolds for Alveolar Bone Regeneration
Open AccessCommunication

Electron Beam Structuring of Ti6Al4V: New Insights on the Metal Surface Properties Influencing the Bacterial Adhesion

1
Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
2
Institute of Materials Science, Joining and Forming, Graz University of Technology, A-8010 GRAZ, Austria
3
Department of Health Sciences, Università del Piemonte Orientale, 28100 Novara, Italy
4
Center for Translational Research on Autoimmune & Allergic Diseases—CAAD, 28100 Novara, Italy
*
Author to whom correspondence should be addressed.
Materials 2020, 13(2), 409; https://doi.org/10.3390/ma13020409
Received: 11 November 2019 / Revised: 8 January 2020 / Accepted: 9 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Multifunctional Materials in Tissue Regeneration)
Soft tissue adhesion and infection prevention are currently challenging for dental transmucosal or percutaneous orthopedic implants. It has previously been shown that aligned micro-grooves obtained by Electron Beam (EB) can drive fibroblast alignment for improved soft tissue adhesion. In this work, evidence is presented that the same technique can also be effective for a reduction of the infection risk. Grooves 10–30 µm wide and around 0.2 µm deep were obtained on Ti6Al4V by EB. EB treatment changes the crystalline structure and microstructure in a surface layer that is thicker than the groove depth. Unexpectedly, a significant bacterial reduction was observed. The surfaces were characterized by field emission scanning electron microscopy, X-ray diffraction, confocal microscopy, contact profilometry, wettability and bacterial adhesion tests. The influence of surface topography, microstructure and crystallography on bacterial adhesion was systematically investigated: it was evidenced that the bacterial reduction after EB surface treatment is not correlated with the grooves, but with the microstructure induced by the EB treatment, with a significant bacterial reduction when the surface microstructure has a high density of grain boundaries. This correlation between microstructure and bacterial adhesion was reported for the first time for Ti alloys. View Full-Text
Keywords: Titanium; bacteria adhesion; microstructure; electron beam structuring; fibroblast alignment Titanium; bacteria adhesion; microstructure; electron beam structuring; fibroblast alignment
Show Figures

Graphical abstract

MDPI and ACS Style

Ferraris, S.; Warchomicka, F.; Iranshahi, F.; Rimondini, L.; Cochis, A.; Spriano, S. Electron Beam Structuring of Ti6Al4V: New Insights on the Metal Surface Properties Influencing the Bacterial Adhesion. Materials 2020, 13, 409.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop