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Mechanical properties of calcium phosphate scaffolds fabricated by robocasting
Author(s) -
Miranda Pedro,
Pajares Antonia,
Saiz Eduardo,
Tomsia Antoni P.,
Guiberteau Fernando
Publication year - 2008
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31587
Subject(s) - materials science , simulated body fluid , composite material , compressive strength , ceramic , porosity , elastic modulus , immersion (mathematics) , biomedical engineering , scanning electron microscope , medicine , mathematics , pure mathematics
The mechanical behavior under compressive stresses of β‐tricalcium phosphate (β‐TCP) and hydroxyapatite (HA) scaffolds fabricated by direct‐write assembly (robocasting) technique is analyzed. Concentrated colloidal inks prepared from β‐TCP and HA commercial powders were used to fabricate porous structures consisting of a 3‐D tetragonal mesh of interpenetrating ceramic rods. The compressive strength and elastic modulus of these model scaffolds were determined by uniaxial testing to compare the relative performance of the selected materials. The effect of a 3‐week immersion in simulated body fluid (SBF) on the strength of the scaffolds was also analyzed. The results are compared with those reported in the literature for calcium phosphate scaffolds and human bone. The robocast calcium phosphate scaffolds were found to exhibit excellent mechanical performances in terms of strength, especially the HA structures after SBF immersion, indicating a great potential of this type of scaffolds for use in load‐bearing bone tissue engineering applications. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res 2008