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http://dx.doi.org/10.4191/KCERS.2004.41.1.045

Surface dissolution of Hydroxyapatite Biomaterials with Ca/P Ratio  

Seo, Dong-Seok (School of Materials Science and Engineering, Seoul National University)
Kim, Hwan (School of Materials Science and Engineering, Seoul National University)
Lee, Jong-Kook (Department of Advanced Materials Engineering, Chosun University)
Publication Information
Journal of the Korean Ceramic Society / v.41, no.1, 2004 , pp. 45-50 More about this Journal
Abstract
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.
Keywords
Hydroxyapatite; Ca/P ratio; Dissolution; Grain boundary; Stoichiometry;
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