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Influence of alumina substrates open porosity on calcium phosphates formation produced by the biomimetic method

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Abstract

We evaluated the influence of the open porosity of alumina (Al2O3) substrates on the phase formation of calcium phosphates deposited onto it surface. The Al2O3 substrates were prepared with different porosities by the foam-gelcasting method associated with different amounts of polyethylene beads. The substrates were coated biomimetically for 14 and 21 days of incubation in a simulated body fluid (SBF). Scanning electron microscopy characterisation and X-ray computed microtomography showed that the increase in the number of beads provided an increase in the open porosity. The X-ray diffraction and infrared spectroscopy showed that the biomimetic method was able to form different phases of calcium phosphates. It was observed that the increase in the porosity favoured the formation of β-tricalcium phosphate for both incubation periods. The incubation period and the porosity of the substrates can influence the phases and the amount of calcium phosphates formed. Thus, it is possible to target the best application for the biomaterial produced.

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Funding

This study was financed by the National Council for Scientific and Technological Development (CNPq) [151281/2015-7; 102905/2015-0].

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Correspondence to Isabela R. Lavagnini.

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Lavagnini, I.R., Campos, J.V., Osiro, D. et al. Influence of alumina substrates open porosity on calcium phosphates formation produced by the biomimetic method. Prog Biomater 11, 263–271 (2022). https://doi.org/10.1007/s40204-022-00193-8

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  • DOI: https://doi.org/10.1007/s40204-022-00193-8

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