Abstract
The effects of heat treatment time and temperature on the delivery behaviour of Ibuprofen from hydroxyapatite particles were investigated in this study. The drug release was seen to follow Fickian diffusion for the initial period of release for all heat treatment conditions. The gradient of Fickian release increased with (1) increasing crystallite size, attributed to the decreasing amount of boundary area, and (2) with decreasing surface area, due to the reduction in porosity and hence tortuosity within the apatite particles. This study has shown that altering the heat treatment conditions used to calcine hydroxyapatite may alter its drug delivery abilities, whereby calcination temperature was noted to influence the drug release behaviour to a greater extent than calcination time.
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Acknowledgements
A. J. Melville would like to thank the Monash University Postgraduate Publication Award scheme for funding during the preparation of this manuscript. L. M. Rodríguez-Lorenzo is supported by the Ramon y Cajal program, Spain. This work was supported by a Monash Research Fund grant and Australian Research Council grant F10017027 and A10017174.
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Melville, A.J., Rodríguez-Lorenzo, L.M. & Forsythe, J.S. Effects of calcination temperature on the drug delivery behaviour of Ibuprofen from hydroxyapatite powders. J Mater Sci: Mater Med 19, 1187–1195 (2008). https://doi.org/10.1007/s10856-007-3185-4
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DOI: https://doi.org/10.1007/s10856-007-3185-4