作者
JD Santos, RL Reis, FJ Monteiro, JC Knowles, GW Hastings
发表日期
1995/6
期刊
Journal of Materials Science: Materials in Medicine
卷号
6
页码范围
348-352
出版商
Kluwer Academic Publishers
简介
Phosphate- and silicate-based glasses were added to hydroxyapatite in order to improve its mechanical properties and to fabricate composites with different degrees of bioactivity. A strong chemical bonding was obtained between hydroxyapatite and the phosphate-based glasses leading to samples approaching theoretical density, according to density measurements and scanning electron microscopy. Bioglass® additions led to the formation of a complex calcium phosphate silicate which hampered the reinforcement process. The fracture toughness of the hydroxyapatite-glass composites was shown to be within the 1.1–1.2 MPam1/2 range, which is double that determined for sintered hydroxyapatite. A 2 μm thick apatite layer was observed on the surface of the hydroxyapatite-glass composites after 48 h immersion in a simulated human blood plasma, whereas only a few apatite crystals were detected on …
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JD Santos, RL Reis, FJ Monteiro, JC Knowles… - Journal of Materials Science: Materials in Medicine, 1995