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2 results on '"biomaterial crystallization precipitation"'

1. Influence of process conditions on hydroxyapatite crystallinity obtained by direct crystallization

Author

M.M. Seckler, M. Danese, S. Derenzo, J.V. Valarelli, M. Giulietti, and R. Rodríguez-Clemente

Subjects
hydroxyapatite, bioceramic, biomaterial crystallization precipitation, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Crystallization from solutions was applied to produce stoichiometric and crystalline hydroxyapatite (HAP) suitable for use as a biomaterial. This was accomplished by keeping a low supersaturation through the following procedure: semi-continuous operating mode, slow reactant addition rate and addition of a calcium complexing agent. A high temperature (90 °C) and probably carbonate incorporation also favored the formation of a well crystallized material. A qualitative correlation was found between the supersaturation and HAP properties such as crystallinity and particle size.

Published
1999
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2. Influence of process conditions on hydroxyapatite crystallinity obtained by direct crystallization

Author

Marcelo Martins Seckler, Marco Giulietti, José Vicente Valarelli, R. Rodríguez-Clemente, Silas Derenzo, and M. Danese

Subjects
Materials science, Biomaterial crystallization recipitation, Mineralogy, Bioceramic, law.invention, chemistry.chemical_compound, Crystallinity, law, lcsh:TA401-492, General Materials Science, Crystallization, Supersaturation, biomaterial crystallization precipitation, Mechanical Engineering, Bioceramics, Biomaterial, hydroxyapatite, Condensed Matter Physics, Chemical engineering, chemistry, Mechanics of Materials, bioceramic, Carbonate, lcsh:Materials of engineering and construction. Mechanics of materials, Particle size, Stoichiometry
Abstract

Crystallization from solutions was applied to produce stoichiometric and crystalline hydroxyapatite (HAP) suitable for use as a biomaterial. This was accomplished by keeping a low supersaturation through the following procedure: semi-continuous operating mode, slow reactant addition rate and addition of a calcium complexing agent. A high temperature (90 °C) and probably carbonate incorporation also favored the formation of a well crystallized material. A qualitative correlation was found between the supersaturation and HAP properties such as crystallinity and particle size, Near-stoichiometric and well crystallized hydroxyapatite was obtained by means of a semi-continuous procedure. Changes in crystallinity and particle size due to varying reagent addition rate, base concentration and pH were consistent with the corresponding changes in the su- Financiadora de Estudos e Projetos do Ministério de Ciência e Tecnologia, Brazil - and CYTED - Programa Iberoamericano de Ciencia y Tecnologia para el Desarollo, proj. VIII.6, Spain - for the financial support.

Published
1999

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