Effect of acidic drinks on shade matching,surface topography,and mechanical properties of conventional and bulk-fill composite resins |
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Authors: | Marcela G Borges Carlos J Soares Thaís S Maia Aline A Bicalho Tarsis P Barbosa Henara L Costa Murilo S Menezes |
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Institution: | 1. Doctoral student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil;2. Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil;3. Doctoral student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil;4. Professor, Department of Oral Health, Technical School of Health, Federal University of Uberlândia (UFU), Uberlândia, Brazil;5. Assistant Professor, Department of Telecommunications and Mechatronic Engineering, Federal University of São João del Rei (UFSJ), São João del Rei, Brazil;6. Associate Professor, School of Engineering, Federal University of Rio Grande (FURG), Rio Grande, Brazil;7. Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, Brazil |
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Abstract: | Statement of problemPosterior 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.PurposeThe 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 methodsA 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.ResultsDC 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.ConclusionsAcidic drinks negatively influenced the physical and mechanical properties of conventional and bulk-fill composite resins. |
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Keywords: | Corresponding author: Dr Murilo de Sousa Menezes Department of Operative Dentistry and Dental Materials School of Dentistry Federal University of Uberlândia Avenida Pará 1720 Bloco 4L Anexo A 3º Piso Sala 42 Campus Umuarama Uberlândia Minas Gerais 38405320 BRAZIL |
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