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Fabrication of multifunctional titanium surfaces by producing hierarchical surface patterns using laser based

Christoph Zwahr1,2, Ralf Helbig3, Carsten Werner3

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Laser-fabricated hierarchical titanium surfaces reduce E. coli adhesion by 30% and protect micro-features from wear. This innovation enhances implant biocompatibility and durability for improved healing and longevity.

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Area of Science:

  • Biomaterials Engineering
  • Surface Science
  • Laser-based Manufacturing

Background:

  • Textured implant surfaces with micro/sub-micrometer features enhance cell adhesion and bacteria repellency.
  • Mechanical stability of textured surfaces is crucial for effective implantation and long-term performance.
  • Biocompatibility and wear resistance are essential for improved implant healing and functional surface protection.

Purpose of the Study:

  • To develop hierarchical patterns on titanium surfaces using laser-based methods.
  • To investigate the antibacterial properties and wear resistance of the fabricated multifunctional surfaces.
  • To evaluate the influence of laser treatment on titanium oxide layer formation.

Main Methods:

  • Direct Laser Writing (DLW) with nanosecond pulses to create 50 µm crater-like structures.
  • Direct Laser Interference Patterning (DLIP) with picosecond pulses to generate 5 µm hole-like patterns.
  • Energy Dispersive X-Ray Spectroscopy (EDS) for oxide layer analysis and wear testing.

Main Results:

  • A 30% reduction in E. coli bacterial adhesion on the multifunctional surface compared to untreated titanium.
  • Wear tests confirmed that larger craters effectively protected the smaller, functional micro-features.
  • Laser treatment influenced the growth of the titanium oxide layer, analyzed via EDS.

Conclusions:

  • Laser-based fabrication successfully created hierarchical titanium surfaces with enhanced antibacterial properties and wear resistance.
  • The designed surface architecture effectively reduces bacterial adhesion and protects critical micro-features from mechanical wear.
  • These findings suggest a promising approach for developing next-generation dental and orthopedic implants with improved clinical outcomes.