Effect of acidic drinks on shade matching, surface topography, and mechanical properties of conventional and bulk-fill composite resins.

Autor: Borges MG; Doctoral student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil., Soares CJ; Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil., Maia TS; Doctoral student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil., Bicalho AA; Professor, Department of Oral Health, Technical School of Health, Federal University of Uberlândia (UFU), Uberlândia, Brazil., Barbosa TP; Assistant Professor, Department of Telecommunications and Mechatronic Engineering, Federal University of São João del Rei (UFSJ), São João del Rei, Brazil., Costa HL; Associate Professor, School of Engineering, Federal University of Rio Grande (FURG), Rio Grande, Brazil., Menezes MS; Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil. Electronic address: murilomenezes@ufu.br.
Jazyk: angličtina
Zdroj: The Journal of prosthetic dentistry [J Prosthet Dent] 2019 May; Vol. 121 (5), pp. 868.e1-868.e8. Date of Electronic Publication: 2019 Apr 20.
DOI: 10.1016/j.prosdent.2019.02.006
Abstrakt: Statement of Problem: Posterior composite restorations may be negatively affected by acidic and colored drinks. Little information is available about the effect of acidic drinks on bulk-fill composite resins.
Purpose: The purpose of this in vitro study was to investigate the effect of acidic drinks on the different properties of conventional and bulk-fill composite resins.
Material and Methods: A conventional composite resin and 2 representative bulk-fill composite resins were used to prepare disk-shaped specimens. The degree of conversion (DC) was monitored by spectroscopy (n=5). The specimens were divided into 5 groups: control, artificial saliva, acai juice, red wine, and Coca-Cola and were maintained for 30 days of challenge (3 periods of 15 min/d). Surface topography parameters were measured by interferometry (n=5). Elastic modulus (E) and Vickers hardness (VH) were determined by microhardness dynamic indentation (n=5). Diametral tensile strength (DTS) was determined at 0.5 mm/min (n=5). Shade matching was evaluated by using the Vitapan Classic Shade Guide. The DC, Sa, Ssk, Sku, Sdq, and DTS were statistically analyzed using 2-way ANOVA, followed by the Tukey HSD tests. E and VH were statistically analyzed by 3-way ANOVA, followed by Tukey HSD tests (α=.05). Shade matching was analyzed with the Kruskal-Wallis test.
Results: DC values were similar for the immediate evaluation and after 24 hours, regardless of the composite resin (P<.05). All surface topography parameters increased significantly after the acidic drinks and were greatest for Coca-Cola. The E, VH, and DTS decreased significantly for all composite resins tested (P<.05). Acai juice and red wine produced more surface staining than Coca-Cola.
Conclusions: Acidic drinks negatively influenced the physical and mechanical properties of conventional and bulk-fill composite resins.
(Copyright © 2019 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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