Abstract
α-CaSiO3 ceramics with a nominal composition of CaO 46.0, SiO2 54.0, and Na2O 0.4 wt% were soaked in two different solutions, simulated body fluid (SBF) and α-minimum essential medium (α-MEM), to study the effect of protein on the formation of hydroxyapatite (HA). The SBF solution contained the same inorganic salts as in the human blood plasma, while the α-MEM solution contained both inorganic salts and various proteins. Both soaking systems were maintained at 36.5°C and a flow rate of about 40 ml/day for various periods of times. A complete coating of HA formed on the surface of the α-CaSiO3 ceramics in both solutions, but with different formation behavior and microstructure. The HA formed in the α-MEM system had ball-like particle morphology with a smaller particle size than the material formed in the SBF system. Cristobalite and/or unknown silicate phase coprecipitate with the HA in the α-MEM system but not in SBF. The HA layer formed on the ceramic surface achieved a thickness of about 80 and 93 μm after 20 days soaking in SBF and α-MEM solutions, respectively. The presence of protein in the α-MEM solution was considered to effect the microstructure of HA and possibly enhanced HA precipitation on the α-CaSiO3 ceramic.
Original language | English |
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Pages (from-to) | 1551-1554 |
Number of pages | 4 |
Journal | Key Engineering Materials |
Issue number | 213 PART 3 |
Publication status | Published - Jan 1 2001 |
Externally published | Yes |
Keywords
- Bioactive materials
- Hydroxyapatite
- Protein
- α-casio ceramics
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering