Fabrication of porous titanium scaffolds with centrosymmetric pore channels and improved radial fracture loading

Porous titanium scaffolds with centrosymmetric pore channels in the radial direction were fabricated by freeze-casting, and TiH 2 /H 2 O slurries with different TiH 2 contents (20, 25, and 30 vol.%) were cast in a cylindrical metal mold. The cold sources at the bottom and side of the metal mold caus...

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Bibliographic Details
Published in:Journal of materials science 2019-02, Vol.54 (4), p.3527-3535
Main Authors: Mao, Mengchen, Tang, Yufei, Zhao, Kang, Duan, Zihao, Wu, Cong
Format: Article
Language:English
Subjects:
Biocompatibility
Bottom casting
Channels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Cold molding
Crystal growth
Crystallography and Scattering Methods
Freezing
Ice crystals
Materials Science
Metal hydrides
Metals
Molds
Polymer Sciences
Scaffolds
Slurries
Solid Mechanics
Surgical implants
Titanium
Titanium compounds
Toxicity
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Summary:Porous titanium scaffolds with centrosymmetric pore channels in the radial direction were fabricated by freeze-casting, and TiH 2 /H 2 O slurries with different TiH 2 contents (20, 25, and 30 vol.%) were cast in a cylindrical metal mold. The cold sources at the bottom and side of the metal mold caused ice crystals to grow radially. The lamellar channels of the porous titanium scaffolds were arranged in centrosymmetric regular channels in the radial axis and afforded the higher radial fracture loading than that of porous titanium prepared by conventional unidirectional freezing. As load-bearing artificial implants, porous titanium scaffolds require high strength in other directions aside from the axial axis. The centrosymmetric regular pore channels can satisfy the clinical demands and improve the security in practical applications, particularly on organisms. The porous scaffold prepared by this method had no toxicity and had good biocompatibility.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-018-3067-9