| Fabrication and Characterization of Porous TCP coated Al2O3 Scaffold by Polymeric Sponge Method |
| Swapan Kumar Sarkar, Young-Hee Kim, Min-Sung Kim, Young-Ki Min, Hun-Mo Yang, Ho-Yeon Song, Byong-Taek Lee |
Department of Biomedical Engineering and Materials, School of Medicine, Soonchunhyang University
1 섂 돀邰 |
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| ABSTRACT |
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A porous $Al_2O_3$, scaffold coated with tricalcium phosphate(TCP) was fabricated by replica method using polyurethane(PU) foam as a fugitive material. Successive coatings of $Al_2O_3$ and hydroxyapatite(HAp) were applied via dip coating onto polyurethane foam, which has a slender and well interconnected network. A porous structure was obtained after sequentially burning out the foam and then sintering at $1500^{circ}C$. The HAp phase was changed to TCP phase at high temperature. The scaffold showed excellent interconnected porosity with pore sizes ranging from $300{sim}700{mu}m$ in diameter. The inherent well interconnected structural feature of PU foam remained intact in the fabricated porous scaffold, where the PU foam material was entirely replaced by $Al_2O_3$ and TCP through a consecutive layering process. Thickness of the $Al_2O_3$ base and the TCP coating was about $7{sim}10{mu}m$ each. The TCP coating was homogeneously dispersed on the surface of the $Al_2O_3$ scaffold. |
| Key words:
TCP coating, Scaffold, Porous structure |
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