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Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
Published on: December 8, 2015
Low stiffness porous Ti structures for load-bearing implants.
B Vamsi Krishna1, Susmita Bose, Amit Bandyopadhyay
1W.M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA.
Acta Biomaterialia
|May 29, 2007
Summary
Novel design and laser-engineered net shaping create complex metallic implants with tunable porosity. This reduces stiffness for load-bearing applications, matching human bone properties for better integration.
Area of Science:
- Biomaterials Engineering
- Additive Manufacturing
- Orthopedic Implants
Background:
- Metallic implant materials require unique properties and manufacturing flexibility.
- Novel design and fabrication methods are needed for advanced implants.
- Porosity control is crucial for matching mechanical properties to bone.
Purpose of the Study:
- To demonstrate a novel design and fabrication approach for metallic implants.
- To achieve complex, functionally graded, and interconnected porosities.
- To reduce stiffness in load-bearing implants for improved biocompatibility.
Main Methods:
- Application of proposed design concepts combined with laser-engineered net shaping (LENStrade mark).
- Fabrication of complex-shaped metallic implants with controlled porosity.
- Characterization of mechanical properties (Young's modulus, proof strength) of porous titanium samples.
Main Results:
- Achieved processing flexibility for complex implant shapes.
- Created three-dimensionally interconnected, designed, and functionally graded porosities down to 70vol.%.
- Porous Ti samples (35-42vol.% porosity) exhibited Young's modulus and 0.2% proof strength similar to human cortical bone.
Conclusions:
- Laser-engineered net shaping enables advanced manufacturing of porous metallic implants.
- The developed method allows for precise control over porosity for tailored mechanical properties.
- This approach offers a promising pathway for creating load-bearing implants with bone-like mechanical characteristics.
