Apatite Mineralization Process from Silicocarnotite Bioceramics: Mechanism of Crystal Growth and Maturation

Andrea Rincon-Lopez J, Andrea Hermann-Munoz J, Cinca-Luis N, Lopez-Conesa L, Andres Fernandez-Benavides D, Garcia-Cano I, Maria Guilemany-Casadamon J, Boccaccini AR, Munoz-Saldana J, Manuel Alvarado-Orozco J (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Crystal Growth and Design American Chemical Society

Book Volume: 20

Pages Range: 4030-4045

Journal Issue: 6

DOI: 10.1021/acs.cgd.0c00322

Abstract

A mechanism for the formation and crystallization processes of bone-like apatite grown on non-stoichiometric silicocarnotite (SC) is here proposed. Single-phase SC powders and ceramics were obtained from fixed mixtures of hydroxyapatite and bioactive glass 45S5. The bioactive behavior of SC was assessed by immersion in Hank's solution at different times. Afterward, a systematic theoretical-experimental study of the structural properties at the micro- and nanoscale using transmission electron microscopy was performed and correlated with scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman techniques to determine the apatite mineralization process from the SC phase. The initial stage of apatite formation from SC was identified as the hydration and further polymerization of silanol groups, resulting in a silica-based hydrogel, which plays a critical role in the ionic exchange. As a result of the adsorption of ionic species from the medium into the silica-based hydrogel, the precipitation of crystalline apatitic structures starts through the emergence of newly formed SC nanocrystals, which act as a template for the crystallization process of a substituted apatite with SC-like structure. Then, because of the polymorphism between SC and HAp structures, the apatite layer retains the SC periodic arrangement following an epitaxial-like growth mechanism. Identification of the apatite layer formation mechanism is critical to understand its physical and chemical properties, which controls the long-term dissolution/precipitation rate of bioactive materials and their performance in the biological environment.

Authors with CRIS profile

Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Center for Research and Advanced Studies of the National Polytechnic Institute / Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN) MX Mexico (MX) Universitat de Barcelona (UB) / University of Barcelona ES Spain (ES) Consorcio de Manufactura Aditiva (CONMAD) MX Mexico (MX)

How to cite

APA:

Andrea Rincon-Lopez, J., Andrea Hermann-Munoz, J., Cinca-Luis, N., Lopez-Conesa, L., Andres Fernandez-Benavides, D., Garcia-Cano, I.,... Manuel Alvarado-Orozco, J. (2020). Apatite Mineralization Process from Silicocarnotite Bioceramics: Mechanism of Crystal Growth and Maturation. Crystal Growth and Design, 20(6), 4030-4045. https://dx.doi.org/10.1021/acs.cgd.0c00322

MLA:

Andrea Rincon-Lopez, July, et al. "Apatite Mineralization Process from Silicocarnotite Bioceramics: Mechanism of Crystal Growth and Maturation." Crystal Growth and Design 20.6 (2020): 4030-4045.

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