Influence of different finishing, aging with coffee, and repolishing protocols on the properties of nanoparticle composite resins.

Autor:	Vargas RP; DDS, MS, Graduate student. Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., Machado AC; DDS, MS, PhD. Professor. Basic, Technical, and Technological Education, Technical School of Health, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., da Silva GR; DDS, MS, PhD. Professor. Division of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., Miranda AS; Graduate student. School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., Campolina MG; MS, Graduate student. Post-Graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., Santos-Filho PC; DDS, MS, PhD. Professor. Division of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil., Menezes MS; DDS, MS, PhD. Professor. Division of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of clinical and experimental dentistry [J Clin Exp Dent] 2024 Jun 01; Vol. 16 (6), pp. e724-e732. Date of Electronic Publication: 2024 Jun 01 (Print Publication: 2024).
DOI:	10.4317/jced.61653
Abstrakt:	Background: Considering the variability of finishing protocols for composite resins, the literature does not offer a consensus about the influence of these approaches to obtain a final polishing and whether the physical properties of these composite resins change at different analysis times. Therefore, the study analyzed the microhardness, roughness, color stability, and gloss of a nanocomposite resin with different finishing, aging with coffee, and repolishing protocols. Material and Methods: Nanocomposite resin samples were divided into three finishing protocol groups: Diamond burs (F and FF), multi-fluted tungsten carbide burs (18 and 30 flutes), and coarse and medium abrasive discs (Soflex-3M). All protocols used spiral rubber tips (F and FF) for polishing. Knoop microhardness (KHN), roughness (Ra), color changes (ΔE00 and YI), and gloss (GU) were analyzed. Scanning electron microscopy provided images of resins and finishing and polishing instruments. Results: Resin KHN ( p <0.001) decreased, and Ra ( p <0.001), ΔE00 ( p <0.001), and YI ( p <0.001) increased after aging with coffee, regardless of finishing protocol. Abrasive discs showed lower color changes, YI, and Ra and higher GU. Repolishing restored KHN and Ra but not ΔE00 ( p >0.05) and YI ( p >0.05). Conclusions: Abrasive disc finishing reduced roughness and yellowness and increased nanocomposite resin gloss after aging with coffee. Key words: Color, Composite resins, Dental materials, Staining, Surface properties. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright: © 2024 Medicina Oral S.L.)
Databáze:	MEDLINE
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