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Surface treatment and post-processing of metallic bio-implants: enhancing performance and biocompatibility
C Uvanarayanan1,2, P Suya Prem Anand1, Geetha Manivasagam2
1School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India.
Frontiers in Bioengineering and Biotechnology
|April 27, 2026
Summary
Surface treatments and post-processing enhance metal bio-implants by improving biocompatibility and performance. Tailored techniques address stress shielding and ion release for safer, more effective medical implants.
Area of Science:
- Biomaterials Engineering
- Surface Science
- Orthopedic Implants
Background:
- Metal bio-implants face challenges due to Young's modulus mismatch with bone, causing stress shielding and ion release.
- Surface properties significantly impact implant performance, biocompatibility, and longevity.
Purpose of the Study:
- To review surface treatment and post-processing techniques for metal bio-implants.
- To highlight methods for enhancing implant performance and biocompatibility.
- To address challenges like stress shielding and toxic ion release.
Main Methods:
- Review of surface coating methods: ion implantation, anodization.
- Analysis of surface modification techniques: laser shock peening, Nitrogen Plasma Immersion Ion Implantation (NP-III).
- Exploration of post-processing methods: laser shock peening (LSP), surface texturing.
Main Results:
- Surface treatments improve tribological and corrosion resistance, and biocompatibility.
- Techniques like NP-III and anodization enhance titanium implant hardness and promote tissue integration.
- Laser-based texturing reduces friction and wear while inducing compressive residual stress.
Conclusions:
- A customized approach to surface modification and post-processing is vital for developing safe and effective bio-implants.
- Optimized surface properties are key to overcoming implant-related complications.
- Advanced techniques enable tailored solutions for diverse orthopedic applications.
