Surface Structure Design and Characterization of Bioabsorbable and Functionally Graded Apatites Originated from Bovine Bone

Abstract:

Abstract. Bioabsorbable and functionally graded apatites (fg-HAp) ceramics were designed using calcined bovine bone (b-HAp) by the partial dissolution-precipitation methods. The fg-HAp ceramics with micro-pores of 10-160 nm had larger specific surface areas (30-40 m2･g-1) than the b-HAp ceramics, although the two HAp ceramics exhibited same macro-pore sizes of 100-600 µm and porosities of 60-80 %. Surface structure of these ceramics was modified by soaking at 309.5 K for 1-90 days in a simulated body fluid (SBF). At 8 days after the soaking, microstructure of the fg-HAp changed from small grains to dense cocoon-like ones by rapid precipitation of HAp microcrystals, while at 14 days, that of the b-HAp was porous urchin-like grains, suggesting that the fg-HAp had higher bone-bonding ability than the b-HAp.

• Periodical: Key Engineering Materials (Volumes 309-311)
• Pages: 1051-1054
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.309-311.1051
• Online since: May 2006
• Authors: Toshiyuki Akazawa, Masaru Murata, Junichi Tazaki, Katsuo Nakamura, Tohru Kanno, Masayoshi Kobayashi, Kohji Itabashi, Makoto Arisue
• Keywords: Bioabsorption, Bovine Bone, Functionally Graded Material (FGM), Hydroxyapatite (HAP), Simulated Body Fluid (SBF), Surface Structure

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