Apatite forming ability and dissolution behavior of boron- And calcium-modified silicon oxycarbides in comparison to silicate bioactive glass

Xie F, Gonzalo Juan I, Arango Ospina M, Riedel R, Boccaccini AR, Ionescu E (2019)

Publication Type: Journal article

Publication year: 2019

Journal

ACS Biomaterials Science and Engineering American Chemical Society

DOI: 10.1021/acsbiomaterials.9b00816

Abstract

The bioactivity of Ca and/or B modified silicon oxycarbides has been assessed in vitro upon immersion in SBF (simulated body fluid). In the context of the present work, bioactivity refers to the likeliness of hydroxyapatite crystallization (biomineralization) on the surface of a material when in contact with physiological fluids. The incorporation of Ca and B into the silicon oxycarbide glass network is found to increase its bioactivity, which seems to scale with the content of Ca; thus, SiOC glass with a relatively large Ca/Si molar ratio (i.e., 0.12) is shown to exhibit bioactive characteristics similar to those of the benchmark silicate bioactive glass of 45S5 composition. The release kinetics of the SiOC glasses modified with Ca and/or B during the SBF test was studied by inductively coupled plasma-optical emission spectroscopy. It has been observed that the Si release kinetics can be correlated with the Ca content in the SiOC glasses: SiOC based glasses modified with Ca exhibited low Si release activation energies (i.e., 0.07 eV), being comparable to that of 45S5 bioactive glass (i.e., 0.04 eV); whereas silicon oxycarbides without Ca modification showed higher activation energies for Si release (i.e., 0.27 eV).

Authors with CRIS profile

Marcela Arango Ospina Lehrstuhl für Werkstoffwissenschaften (Biomaterialien) Aldo Boccaccini Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)

Involved external institutions

Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Xie, F., Gonzalo Juan, I., Arango Ospina, M., Riedel, R., Boccaccini, A.R., & Ionescu, E. (2019). Apatite forming ability and dissolution behavior of boron- And calcium-modified silicon oxycarbides in comparison to silicate bioactive glass. ACS Biomaterials Science and Engineering. https://dx.doi.org/10.1021/acsbiomaterials.9b00816

MLA:

Xie, Fangtong, et al. "Apatite forming ability and dissolution behavior of boron- And calcium-modified silicon oxycarbides in comparison to silicate bioactive glass." ACS Biomaterials Science and Engineering (2019).

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