| Issue |
MATEC Web Conf.
Volume 109, 2017
2017 2nd International Conference on Materials Science and Nanotechnology (ICMSNT 2017) – 2017 2nd International Symposium on Material Science and Technology (ISMST 2017)
|
|
|---|---|---|
| Article Number | 04002 | |
| Number of page(s) | 7 | |
| Section | Chapter 4: Properties and Service Behaviours of Materials and Nanomaterials | |
| DOI | https://doi.org/10.1051/matecconf/201710904002 | |
| Published online | 31 May 2017 | |
The Impact of Iodoform on the Hydration, Bioactivity and Antimicrobial Properties of White Portland Cement
1 Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent, ME4 4TB, UK
2 State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
a Corresponding author: n.coleman@gre.ac.uk
Iodoform (CHI3) is a potential radiopacifying agent for use in Portland cement-based root-filling materials. During this study, the impact of 20 wt% iodoform on the hydration and setting of white Portland cement (WPC) was monitored by powder X-ray diffraction, 29Si magic angle spinning nuclear magnetic resonance spectroscopy and Vicat apparatus. The presence of 20 wt% iodoform reduced the initial and final setting times of WPC from 150 to 121 min and 200 to 165 min, respectively. Iodoform had little impact on the products and extent of hydration after 7 days of curing; although, it did cause a reduction in the mean silicate chain length of the C-S-H gel (from 4.11 to 3.47 units). Both iodoform-blended and unblended cement pastes exhibited similar in vitro bioactivity, with the formation of crystalline hydroxyapatite on their surfaces within 1 day of exposure to simulated body fluid. An inhibition zone assay confirmed that WPC possesses intrinsic antimicrobial activity against S. aureus, P. aeruginosa and E. coli, which is significantly enhanced in the presence of iodoform. This study indicates that iodoform may be a suitable radiopacifying agent for Portland cement-based dental restoratives; although, further work is required to determine its long-term stability within the cement matrix.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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