Characterization of low-cost Brazilian resin composites submitted to tooth brushing

Ferretti, Marcela Alvarez; Pereira, Renata; Lins, Rodrigo Barros Esteves; Soares, Mariana; Pinto, Larissa Jacó Hessel; Martins, Luís Roberto Marcondes; Aguiar, Flávio Henrique Baggio

doi:10.1590/1807-3107bor-2021.vol35.0010

Cited by 6 publications

(13 citation statements)

References 38 publications

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“…The exposed hard particles of zirconia presented by Filtek Z250 XT led then to increase of microhardness. Likewise, previous studies reported similar results ( 14 , 19 ). Such finding point out again the impact of the composite protection by the wetting agent, so much so that the microhardness was maintained for the group covered by wetting agent and submitted to brushing cycles.…”

Section: Discussionsupporting

confidence: 87%

“…In case of the group not covered by wetting agent, besides not being protected by a hodrophobic-like material, the alcohol content associated with the low pH of red wine might have contributed, albeit at very subtle levels, to plasticize the polymer matrix and soft the composite surface ( 21 ). When it was also submitted to brushing, though, as already elucidated, the organic matrix was abraded and got further softer, leading also to particles protrusion or removal ( 14 , 20 ). The exposed hard particles of zirconia presented by Filtek Z250 XT led then to increase of microhardness.…”

Section: Discussionmentioning

confidence: 87%

“…As explained by Ruivo et al . ( 20 ), as well as by Ferretti and collegues ( 14 ), when composites are submitted to brushing, chewing and other stresses, the organic matrix is abraded, leading to particles protrusion or removal, which increases the peak-valley distance and leads to development of cracks, resulting in greater surface roughness. The coverage by wetting agent, in this case, did not make an exception to the rule, especially because of the high organic matrix and lower particle content of the agent.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, further studies are necessary to analyze the effects of wetting agents on the properties of resin composites, in order to indicate their safe use during clinical practice. The aim of this in vitro study was to evaluate Gloss, Color, Roughness and Microhardness of a mycrohibrid conventional resin composite (Filtek Z250 XT, 3M Oral Care, St. Paul, MN, USA), commonly used in clinical practice ( 14 ), covered or not by a wetting agent (Modeling Resin, Bisco, Schaumburg, IL, USA), submitted to brushing and/or staining cycles with red wine.…”

Section: Introductionmentioning

confidence: 99%

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Effect of wetting agent coverage on the surface properties of resin composite submitted to brushing and staining cycles

Pereira

Silva

et al. 2021

J Clin Exp Dent

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Background Wetting agents facilitate the composites handling, acting as a lubricant and decreasing their stickness to spatula. The effects of these materials on the properties of composites are not completely clear. This study aimed to evaluate Gloss, Color, Roughness and Microhardness of a composite (Filtek Z250 XT, 3M Oral Care) covered by a wetting agent (Modeling Resin, Bisco), submitted to brushing and staining cycles with red wine. Material and Methods Cylinder-shaped samples (8 mm ø x 2 mm height) were divided into 4 groups, according to application of wetting agent and brushing cycles (n = 20). The composite was placed in the orifice of a polytetrafluoroethylene mold, received wetting agent coverage, and was light-cured. Gloss, Color, Roughness and Microhardness were evaluated in two times: after samples confection and after brushing + staining cycles. Data were submitted to one-way ANOVA and Tukey’s test (ΔL, Δa, Δb and ΔE) and two-way repeated measures ANOVA and Bonferronis’s test (gloss, roughness and microhardness). Results In general, the composite showed higher gloss values when added by the wetting agent. No statistical differences were observed regarding colors’ groups. Roughness increased after brushing cycles, regardless of wetting agent application. The only group which presented decreased Microhardness after cycles was the group without wetting agent, only submitted to staining with red wine. Conclusions The application of wetting agent on the composite did not interfere negatively with its properties of Gloss, Color, Roughness and Microhardness. Key words: Resin composite, wetting agent, surface properties, gloss, color, esthetic dentistry.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of wetting agent coverage on the surface properties of resin composite submitted to brushing and staining cycles

Pereira

Silva

et al. 2021

J Clin Exp Dent

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“…Twenty‐nine articles were included to address the second aim of the study that focused on the effect of toothbrush abrasion on the maintenance of high gloss/smoothness of different composite formulations and these are summarized in Table 3 53–81 . A more detailed table containing all the specific Ra/Sa and GU data for each material/polisher combination, for before and after toothbrush abrasion, is presented in Supplemental Table 2.…”

Section: Resultsmentioning

confidence: 99%

Development and maintenance of surface gloss of dental composites after polishing and brushing: Review of the literature

Amaya-Pajares

Koi

Watanabe

et al. 2022

J Esthet Restor Dent

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Objective To describe the effect of the composites' composition to produce high surface smoothness/gloss using finishers/polishers, and to assess maintained smoothness/gloss under toothbrush abrasion. Materials and methods PubMed papers published from January 01, 2000 to September 01, 2021 were included, and keywords used were: filler particle size, shape, amount of dental composites; finishing/polishing, gloss/roughness, and toothbrush abrasion of composites. Seventy‐five in‐vitro studies were included in this literature review. Forty‐six articles assessed filler particle size/composition/shape and distribution to obtain high gloss/smoothness on different formulations; and the finishers/polishers effect on these materials. Twenty‐nine papers assessed toothbrush abrasion of composites. Results Suprananofill/nanofill/microfills typically showed the smoothest and glossiest surfaces compared to nanohybrid, microhybrid and hybrid composites. Microfill (0.04–0.07 μm, 71–88 GU); suprananofill (0.001–0.8 μm, 52–92 GU), microhybrids (0.05–0.35 μm, 35–95 GU) and nanohybrids (0.05–0.21 μm, 66–97 GU). Composites with small, spherical particles tend to show smoother, glossier surfaces and more wear resistant compared to resin composites with larger or irregular particles. Several studies showed higher roughness and reduced gloss after toothbrush abrasion. Conclusions Within the limitations of this study, suprananofill/nanofill/microfill composites tended to show the smoothest/glossiest surfaces due to smaller particle size. Composites with small, spherical particles tended to show smoother/glossier surfaces. Overall, toothbrush abrasion showed higher surface roughness and reduced gloss. Clinical Significance Suprananofills/nanofills/microfills had good polishability and polish retention due to their smaller particle size. The effectiveness of a polishing system is material‐dependent. In general, Enhance‐PoGo, Sof‐Lex discs, and Sof‐Lex Spiral wheels showed similar level of smoothness.

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Effects of Different Over – the - Counter Whitening Products on the Microhardness, Surface Roughness, Color and Shear Bond Strength of Enamel

Yildirim¹,

Vural²,

Çakır³

et al. 2022

Acta Stomatol Croat

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Objective The purpose of this in vitro study was to evaluate the effects of four over-the-counter (OTC) whitening products on the microhardness, surface roughness, color, shear bond strength (SBS) and surface charecteristics of human enamel compared with a product used for dentist-supervised home whitening. Materials and methods Seventy eight enamel specimens allocated into 6 groups (n=13): 1-Opalescence PF 10% (OP) dentist prescribed home whitening product, 2-Opalescence Go prefilled tray (PT), 3-Opalescence Whitening Toothpaste (WT), 4-Listerine Healthy White whitening mouth rinse (WMR), 5-Cavex Bite&White whitening pen (WP) and 6- no treatment (Con). The microhardness (VHN), surface roughness (Ra) and color of the specimens were measured (T 0 ). The specimens were then subjected to whitening protocols for 14 days (T 1 .) followed by artificial saliva storage for 14 days (T 2 ). The measurements were repeated at T 1 and T 2 . The SBS test was done after the application of 35% phosphoric acid (Scotchbond Universal Etchant), followed by a universal adhesive (G-Premio Bond) and a micro hybrid/universal resin composite (Essentia) into a Teflon tube attached to the enamel surface (p<0.05). Surface morphologies of the enamel surfaces were examined by SEM. p value was set at 0.05 Results Application of OP, PT and WP decrased the microhardness of enamel specimens (p<0.05) whereas, no significant changes were seen in the microhardness of enamel specimens treated with WT and WMR (p>0.05). Ra values of enamel specimens increased with the application of OP, PT and WT (p<0.05); whereas no changes were observed after the applications of WMR and WP (p>0.05). OP, PT, WMR, and WP changed the color of the enamel(p<0.05). There were not any significant differences among the SBSs groups, apart from OP applied enamel specimens. OP showed the least SBS values (p=0.001). SEM observations revealed smooth enamel surfaces. Conclusions The whitening products affected the microhardness, surface roughness, color of enamel differently. Only OP decreased the SBS of the enamel.

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Characterization of low-cost Brazilian resin composites submitted to tooth brushing

Cited by 6 publications

References 38 publications

Effect of wetting agent coverage on the surface properties of resin composite submitted to brushing and staining cycles

Effect of wetting agent coverage on the surface properties of resin composite submitted to brushing and staining cycles

Development and maintenance of surface gloss of dental composites after polishing and brushing: Review of the literature

Effects of Different Over – the - Counter Whitening Products on the Microhardness, Surface Roughness, Color and Shear Bond Strength of Enamel

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