Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 34, Issue -, Pages 110-114Publisher
ELSEVIER
DOI: 10.1016/j.msec.2013.08.043
Keywords
Porous TiNi alloy; Slurry immersing with polymer sponge and sintering method; Pore structural properties; Compressing properties; Biological evaluation in vitro; Cancellous bone substitute
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Funding
- Fundamental Research Funds for the Central Universities of Central South University [2012zztsa012]
- National Natural Science Foundation of China [51274247]
- National High Technology Research and Development Program [2012BAE06B00]
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The superelastic nature of repeating the human bones is crucial to the ideal artificial biomedical implants to ensure smooth load transfer and foster the ingrowth of new bone tissues. Three dimensional interconnected porous TiNi scaffolds, which have the tailorable porous structures with micro-hole, were fabricated by slurry immersing with polymer sponge and sintering method. The crystallinity and phase composition of scaffolds were studied by X-ray diffraction. The pore morphology, size and distribution in the scaffolds were characterized by scanning electron microscopy. The porosity ranged from 65 to 72%, pore size was 250-500 mu m. Compressive strength and elastic modulus of the scaffolds were similar to 73 MPa and similar to 3GPa respectively. The above pore structural and mechanical properties are similar to those of cancellous bone. In the initial cell culture test, osteoblasts adhered well to the scaffold surface during a short time, and then grew smoothly into the interconnected pore channels. These results indicate that the porous TiNi scaffolds fabricated by this method could be bone substitute materials. (C) 2013 Elsevier B.V. All rights reserved.
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