Li, Qiu, Deacon, Andrew D. and Coleman, Nichola J. (2013) The impact of zirconium oxide nanoparticles on the hydration chemistry and biocompatibility of white Portland cement. Dental Materials Journal, 32 (5). pp. 808-815. ISSN 0287-4547 (Print), 1881-1361 (Online) (doi:https://doi.org/10.4012/dmj.2013-113)

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Abstract

Zirconium oxide (ZrO2) has been nominated as a radiopacifying agent for use in MTA-like Portland cement-based root-filling materials. This research examines the impact of 20 wt% ZrO2 nanoparticles in the size range 50 to 75 nm on the early hydration chemistry of white Portland cement. Nano-ZrO2 was found to accelerate the degree of hydration by 26% within the first 24 h by presenting efficient nucleation sites for the precipitation and growth of the early C-S-H gel products. The presence of nano-ZrO2 was also found to divert the fate of the aluminium-bearing reaction products by lowering the ettringite to monosulphate ratio, reducing the size of the ettringite crystals and by increasing the Al:Si ratio of the C-S-H gel phase. The chemical and microstructural changes conferred upon the cement matrix by the nano-ZrO2 particles had a positive impact on in vitro biocompatibility with respect to MG63 osteosarcoma cells (via MTT assay).

Item Type:	Article
Additional Information:	[1] Received: 14 April 2013. [2] Accepted: 16 July 2013. [3] First published: 1 October 2013. [4] Dental Materials Journal is the official journal of the Japanese Society for the Dental Materials and Devices.
Uncontrolled Keywords:	white Portland cement, cement hydration, radiopacifier, zirconium oxide, nanoparticles, nuclear magnetic resonance spectroscopy
Subjects:	Q Science > QD Chemistry R Medicine > RK Dentistry
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Related URLs:	Publisher Publisher
Last Modified:	06 Dec 2016 12:02
URI:	http://gala.gre.ac.uk/id/eprint/11821

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