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Updated: Jul 13, 2026
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Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing
Published on: April 28, 2023
Processing and biocompatibility evaluation of laser processed porous titanium.
Weichang Xue1, B Vamsi Krishna, Amit Bandyopadhyay
1W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA.
Acta Biomaterialia
|July 14, 2007
Summary
Laser Engineered Net Shaping (LENS) fabricated porous titanium implants with tunable properties. These porous titanium structures enhance bone cell adhesion, proliferation, and differentiation, promoting better implant integration.
Area of Science:
- Biomaterials Engineering
- Orthopedic Implants
- Additive Manufacturing
Background:
- Porous metallic implants are crucial for bone regeneration and osseointegration.
- Titanium (Ti) is a preferred material for implants due to its biocompatibility and mechanical properties.
- Controlling porosity and pore size is key to optimizing implant performance and cell response.
Purpose of the Study:
- To fabricate porous titanium (Ti) implants using Laser Engineered Net Shaping (LENS).
- To investigate the effects of varying porosity and pore size on mechanical properties.
- To evaluate the in vitro biological response of human osteoblast cells (OPC1) to these porous Ti structures.
Main Methods:
- Fabrication of porous Ti using the LENS additive manufacturing technique.
- Characterization of porosity (17-58 vol.%) and pore size (up to 800 µm).
- Assessment of mechanical strength (24-463 MPa) and Young's modulus (2.6-44 GPa).
- In vitro evaluation of human osteoblast cell (OPC1) adhesion, proliferation (MTT assay), differentiation, and extracellular matrix production.
Main Results:
- LENS enabled fabrication of porous Ti with controlled porosity and mechanical properties.
- OPC1 cells exhibited good spreading and adhesion on porous Ti surfaces.
- Porous Ti significantly enhanced cell proliferation and differentiation compared to polished Ti.
- A critical pore size of ≥200 µm was identified for effective cell ingrowth.
Conclusions:
- LENS is a viable method for producing porous Ti implants with tailored properties.
- Porous Ti structures promote enhanced bone cell activity, including proliferation and differentiation.
- Optimized pore size is critical for achieving cell ingrowth and successful osseointegration.
- These findings suggest potential for improved clinical outcomes in orthopedic applications.
