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Surface engineering of titanium-based implants using electrospraying and dip coating methods.

Akbar Javadi1, Atefeh Solouk1, Masoumeh Haghbin Nazarpak2

  • 1Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.

Materials Science & Engineering. C, Materials for Biological Applications
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Summary

Surface modification of titanium implants using electrospraying improved osseointegration and cellular response. This technique shows promise for enhancing orthopedic implant longevity and performance.

Keywords:
Dip coatingElectrosprayingSurface modificationTitanium implants

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Area of Science:

  • Biomaterials Engineering
  • Orthopedic Implant Technology
  • Surface Science

Background:

  • Titanium alloys are widely used in orthopedic implants due to their favorable properties.
  • Implant loosening remains a significant clinical challenge, necessitating improved osseointegration and biocompatibility.
  • Surface modification techniques are crucial for enhancing implant-tissue integration.

Purpose of the Study:

  • To modify titanium surface topography using electrospraying to improve implant performance.
  • To evaluate the bioactivity and cellular response of modified titanium surfaces.
  • To compare electrospraying with dip coating for titanium surface functionalization.

Main Methods:

  • Titanium surfaces were modified using electrospraying and dip coating with a titanium salt and polyvinylpyrrolidone solution.
  • Samples underwent pyrolysis at 500°C to stabilize surface microstructures.
  • Surface characterization included SEM, AFM, XRD, and water contact angle measurements.
  • Bioactivity was assessed via simulated body fluid immersion and precipitate analysis.
  • Cellular response was evaluated using cell morphology, MTT, and alkaline phosphatase assays.

Main Results:

  • Electrospraying and dip coating successfully altered titanium surface topography.
  • Modified surfaces exhibited enhanced bioactivity and improved cellular responses.
  • Specific electrosprayed (SP15) and dip-coated (DP3) samples demonstrated superior results compared to controls.
  • Characterization confirmed changes in surface microstructure and properties.

Conclusions:

  • Electrospraying presents a promising method for titanium implant surface modification.
  • Enhanced bioactivity and cellular response indicate potential for improved osseointegration.
  • The modified surfaces, particularly DP3 and SP15, show potential for reducing implant loosening and improving clinical outcomes.