| CaO-SiO2-B2O3계 결정화 유리의 제조와 in-vitro법을 이용한 생체활성 평가 |
| 류현승, 서준혁, 김환, 홍국선, 김득중1, 이재협2, 이동호2, 장봉순2, 이춘기2 |
서울대학교 재료공학부
1성균관대학교 재료공학과
2서울대학교 의과대학 정형외과 |
| Preparation of CaO-SiO2-B2O3 Glass-ceramics and Evaluation of Bioactivity Using in-vitro Test |
| Hyun-Seung Ryu, Jun-Hyuk Seo, Hwan Kim, Kug-Sun Hong, Deug-Joong Kim1, Jae-Hyup Lee2, Dong-Ho Lee2, Bong-Soon Chang2, Choon-Ki Lee2 |
School of Materials Science and Engineering, Seoul National University
1Department of Materials Engineering, Sungkyunkwan University
2Department of Orthopedic surgery, Seoul National University |
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| ABSTRACT |
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Sintering property, mechanical property and bioactivity of $CaO-SiO_2-B_2O_3$ glass-ceramics were investigated. This glass-ceramics was sintered at 750-830${circ}$ and showed nearly pore-free microstructure. The glass-ceramics consisted of three phases, i.e. monclinic-wollastonite, calcium borate and borosilicate glass matrix. The mechanical strength was higher than that of other bioactive ceramics, especially compressive strength(2813 MPa) and fracture toughness($3.12 MPa{cdot}m^{1/2}$). Bioactivity of the glass-ceramics depends on amount of $CaB_2O_4$ and borosilicate glass matrix. It might be likely that more soluble $CaB_2O_4$ raises supersaturation of Ca ion in SBF solution and borosilicate glass forms Si-OH group that presents nucleation site of hydroxycarbonate apatite(HCA) layer. So, glassceramics of more $CaB_2O_4$ and borosilicate glass showed better bioactivity. |
| Key words:
Sintering, CaO-$SiO_2-B_2O_3$ glass-ceramics, Wollastonite, Bioactivity, Mechanical strength |
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