| Ca/P 비에 따른 수산화아파타이트 생체재료의 표면용해 특성 |
| 서동석, 김환, 이종국1 |
서울대학교 재료공학부
1조선대학교 신소재공학과 |
| Surface dissolution of Hydroxyapatite Biomaterials with Ca/P Ratio |
| Dong-Seok Seo, Hwan Kim, Jong-Kook Lee1 |
School of Materials Science and Engineering, Seoul National University
1Department of Advanced Materials Engineering, Chosun University |
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| ABSTRACT |
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Hydroxyapatite (HA) ceramics with the Ca/P ratios of 1.62, 1.67 and 1.72 were prepared and their dissolution behaviors in distilled water at $37^{circ}C$ were investigated. It appeared that surface dissolution of the ceramics was initiated from grain boundaries after 3 days of immersion in water. Following 10 days of immersion, microstructural disintergration of HA was severs for non-stoichiometric compounds, I.e Ca/P ratios of 1.62 and 1.72. Notably, a micron-sized circular cavity similar to lacunae, which can be generally formed in osteoclastic resorption process, was observed. |
| Key words:
Hydroxyapatite, Ca/P ratio, Dissolution, Grain boundary, Stoichiometry |
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