Bioceramics: Materials and Applications IV, Volume 147 by PDF

ISBN-10: 1118406060

ISBN-13: 9781118406069

ISBN-10: 1574982028

ISBN-13: 9781574982022

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Rusin and Claire A. Rutiser Copyright © 2003, The American Ceramic Society Porous Hydroxyapatite Containing Silicon derived from Natural Coral Y. H. Kim», S. R. Kim, S. J. Jung, Y. J. Lee, and H. kr ABSTRACT Ion-substituted hydroxyapatite may be used as a biological material in the form of porous body. A porous silicon-substituted hydroxyapatite has been prepared using natural coral as a calcium source to obtain a biomaterial having a good biocompatibility. From the XRD analysis, it was confirmed that the single-phase hydroxyapatite containing silicon has formed without revealing the presence of extra phases related to silicon dioxide or other calcium phosphate species.

Successful deposition of hydroxyapatite coatings on AI2O3 was achieved from an aqueous solution of calcium and phosphate ions containing EDTA disodium salt as a chelating agent and hydrogen peroxide. The deposition was strongly dependent on the pH of the solution. 8. Initial formation of the coating occurred with the hydroxyapatite crystals aligned parallel to the AI2O3 surface but the orientation soon changed to give growth with the c-axis perpendicular to the surface. The extent of the orientation increased with time to give nearly perpendicular orientation after -12 h.

Ethanol) residue in the coating process. The EDX results were further supported by the structural information obtained from FTIR. The split bands at 1020, 1108 cm"1 (Fig. 3) correspond to the antisymmetric stretch of phosphate group and the weak band at 872 cm"1 corresponds to P-OH stretch. However, the bands characteristic of OCP 8 at 917 and 1295 cm'1 were not observed. Above 3000 cm"1, a diffused peak associated with adsorbed water or ethanol was observed and the peak characteristic of apatite was not detected (not shown herein).

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Bioceramics: Materials and Applications IV, Volume 147


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