Characterisation of Microparticle Waste from Dental Resin-Based Composites

Mulligan, Steven; Ledo, Jesus Ojeda; Kakonyi, Gabriella; Thornton, Steven F.; Moharamzadeh, Keyvan; Martin, Nicolas

doi:10.3390/ma14164440

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Characterisation of Microparticle Waste from Dental Resin-Based Composites

Steven Mulligan, Jesus Ojeda Ledo

, Gabriella Kakonyi, Steven F. Thornton, Keyvan Moharamzadeh, Nicolas Martin

Materials, Volume: 14, Issue: 16, Start page: 4440

Swansea University Author: Jesus Ojeda Ledo

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DOI (Published version): 10.3390/ma14164440

Abstract

Clinical applications of resin-based composite (RBC) generate environmental pollution in the form of microparticulate waste. Methods: SEM, particle size and specific surface area analysis, FT-IR and potentiometric titrations were used to characterise microparticles arising from grinding commercial a...

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Published in:	Materials
ISSN:	1996-1944
Published:	MDPI AG 2021
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URI:	https://cronfa.swan.ac.uk/Record/cronfa57535
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spelling	2021-09-09T15:23:10.6885015 v2 57535 2021-08-05 Characterisation of Microparticle Waste from Dental Resin-Based Composites 4c1c9800dffa623353dff0ab1271be64 0000-0002-2046-1010 Jesus Ojeda Ledo Jesus Ojeda Ledo true false 2021-08-05 CHEG Clinical applications of resin-based composite (RBC) generate environmental pollution in the form of microparticulate waste. Methods: SEM, particle size and specific surface area analysis, FT-IR and potentiometric titrations were used to characterise microparticles arising from grinding commercial and control RBCs as a function of time, at time of generation and after 12 months ageing in water. The RBCs were tested in two states: (i) direct-placement materials polymerised to simulate routine clinical use and (ii) pre-polymerised CAD/CAM ingots milled using CAD/CAM technology. Results: The maximum specific surface area of the direct-placement commercial RBC was seen after 360 s of agitation and was 1290 m2/kg compared with 1017 m2/kg for the control material. The median diameter of the direct-placement commercial RBC was 6.39 μm at 360 s ag-itation and 9.55 μm for the control material. FTIR analysis confirmed that microparticles were sufficiently unique to be identified after 12 months ageing and consistent alteration of the outermost surfaces of particles was observed. Protonation-deprotonation behaviour and the pH of zero proton charge (pHzpc) ≈ 5–6 indicated that the particles are negatively charged at neutral pH7. Conclusion: The large surface area of RBC microparticles allows elution of constituent monomers with potential environmental impacts. Characterisation of this waste is key to understanding potential mitigation strategies. Journal Article Materials 14 16 4440 MDPI AG 1996-1944 resin-based composite; pollution; microplastic; microparticle; particles size analysis; potentiometric titration; FTIR 8 8 2021 2021-08-08 10.3390/ma14164440 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University Another institution paid the OA fee Shirley Glasstone Hughes Research Grant REF: 002-2013 2021-09-09T15:23:10.6885015 2021-08-05T13:57:27.9386346 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Steven Mulligan 1 Jesus Ojeda Ledo 0000-0002-2046-1010 2 Gabriella Kakonyi 3 Steven F. Thornton 4 Keyvan Moharamzadeh 5 Nicolas Martin 6 57535__20663__a5d04892a7f1443d96086b9e6303093d.pdf 57535.pdf 2021-08-18T15:09:11.5754607 Output 2799713 application/pdf Version of Record true © 2021 by the authors. This is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true eng https://creativecommons.org/licenses/by/4.0/
title	Characterisation of Microparticle Waste from Dental Resin-Based Composites
spellingShingle	Characterisation of Microparticle Waste from Dental Resin-Based Composites Jesus Ojeda Ledo
title_short	Characterisation of Microparticle Waste from Dental Resin-Based Composites
title_full	Characterisation of Microparticle Waste from Dental Resin-Based Composites
title_fullStr	Characterisation of Microparticle Waste from Dental Resin-Based Composites
title_full_unstemmed	Characterisation of Microparticle Waste from Dental Resin-Based Composites
title_sort	Characterisation of Microparticle Waste from Dental Resin-Based Composites
author_id_str_mv	4c1c9800dffa623353dff0ab1271be64
author_id_fullname_str_mv	4c1c9800dffa623353dff0ab1271be64_***_Jesus Ojeda Ledo
author	Jesus Ojeda Ledo
author2	Steven Mulligan Jesus Ojeda Ledo Gabriella Kakonyi Steven F. Thornton Keyvan Moharamzadeh Nicolas Martin
format	Journal article
container_title	Materials
container_volume	14
container_issue	16
container_start_page	4440
publishDate	2021
institution	Swansea University
issn	1996-1944
doi_str_mv	10.3390/ma14164440
publisher	MDPI AG
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str	1
active_str	0
description	Clinical applications of resin-based composite (RBC) generate environmental pollution in the form of microparticulate waste. Methods: SEM, particle size and specific surface area analysis, FT-IR and potentiometric titrations were used to characterise microparticles arising from grinding commercial and control RBCs as a function of time, at time of generation and after 12 months ageing in water. The RBCs were tested in two states: (i) direct-placement materials polymerised to simulate routine clinical use and (ii) pre-polymerised CAD/CAM ingots milled using CAD/CAM technology. Results: The maximum specific surface area of the direct-placement commercial RBC was seen after 360 s of agitation and was 1290 m2/kg compared with 1017 m2/kg for the control material. The median diameter of the direct-placement commercial RBC was 6.39 μm at 360 s ag-itation and 9.55 μm for the control material. FTIR analysis confirmed that microparticles were sufficiently unique to be identified after 12 months ageing and consistent alteration of the outermost surfaces of particles was observed. Protonation-deprotonation behaviour and the pH of zero proton charge (pHzpc) ≈ 5–6 indicated that the particles are negatively charged at neutral pH7. Conclusion: The large surface area of RBC microparticles allows elution of constituent monomers with potential environmental impacts. Characterisation of this waste is key to understanding potential mitigation strategies.
published_date	2021-08-08T04:13:21Z
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score	11.037144

Characterisation of Microparticle Waste from Dental Resin-Based Composites

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