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Detection of Nanoparticles Released at Finishing of Dental Composite Materials.
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SYSNO ASEP 0473542 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Detection of Nanoparticles Released at Finishing of Dental Composite Materials. Author(s) Bradna, P. (CZ)
Ondráčková, Lucie (UCHP-M) RID, ORCID, SAI
Ždímal, Vladimír (UCHP-M) RID, ORCID, SAI
Navrátil, Tomáš (UFCH-W) RID, ORCID
Pelclová, D. (CZ)Source Title Monatshefte fur Chemie. - : Springer - ISSN 0026-9247
Roč. 148, č. 3 (2017), s. 531-537Number of pages 7 s. Action International Conference on Modern Electrochemical Methods /36./ Event date 23.05.2016 - 27.05.2016 VEvent location Jetřichovice Country CZ - Czech Republic Event type EUR Language eng - English Country AT - Austria Keywords dental composite ; grinding ; nanoparticles ; aerosol ; health risk Subject RIV DN - Health Impact of the Environment Quality OECD category Public and environmental health Subject RIV - cooperation J. Heyrovsky Institute of Physical Chemistry - Physical ; Theoretical Chemistry Institutional support UCHP-M - RVO:67985858 ; UFCH-W - RVO:61388955 UT WOS 000396528600019 EID SCOPUS 85011673179 DOI 10.1007/s00706-016-1912-6 Annotation Newly developed dental composite materials contain increased concentrations of filler particles of the nanometer size to produce materials with high mechanical and wear resistance, improved polishability, and long-lasting gloss. With nanocomposites, however, a question arises on possible health risk caused by filler nanoparticles released during finishing and polishing nanocomposite restorations in dental cabinets. As data in the current literature are conflicting, our study was focused on detailed characterization of aerosol particles released during grinding nanocomposites Filtek Ultimate and Estelite Sigma Quick by diamond and tungsten carbide bladed burs. The results were compared with the aerosol particle size obtained from a composite Charisma reinforced with micrometer-size filler particles and an unfilled resin. Using a scanning mobility particle sizer and aerodynamic particle sizer, the release of nano- and micro-sized particles generated during high-speed grinding was detected. The mode of nanoparticle size distribution ranged not only from less than 16.0 to 51.6 nm for both nanocomposites, but also for the microhybrid composite and the unfilled resin. However, the amount of nanoparticles in the aerosol (5.0–68) × 103 cm−3 was not high exceeding 1–8.5 times their background concentration. The release of nanoparticles independently on the filler particle size and their content might suggest that the aerosol nanoparticles may originate from thermal decomposition of composite polymeric matrix due to friction heat rather than from filler nanoparticles. Due to the potential adverse health effects of nanoparticles, more detailed research is needed to investigate the effect of finishing conditions on the nanoparticle generation and their chemical composition to avoid any potential risk to dental staff. A study of the aerosol formed during grinding with water cooling to avoid heating will also be carried out. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2018
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