The influence of nanoscale inorganic content over optical and surface properties of model composites

Salgado, Vinícius Esteves; Cavalcante, Larissa Maria; Silikas, Nick; Schneider, Luís Felipe Jochims

doi:10.1016/j.jdent.2013.05.011

Cited by 51 publications

(56 citation statements)

References 45 publications

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“…The diamond stylus travelled at a constant speed of 1 mm/s across the surface with a force of 6 mN. Six line scans were performed on the top surface of each specimen, three in horizontal and three in perpendicular directions 9 . The cut-off length was 0.25 mm and the measuring length 2 mm.…”

Section: Surface Properties Analysesmentioning

confidence: 99%

Bulk and surface properties related to composite filler size

Gerhardt¹,

Silva²,

Rego³

et al. 2013

Braz. J. Oral Sci.

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There are few studies that fully characterize the effect of the filler size on the surface, optical and mechanical properties of resin composites. Aim: To determine the influence of the filler size content on surface, optical and mechanical properties before and after accelerated aging. Methods: Seven resin composites were investigated: Filtek Supreme® (3M/ESPE), Estelite Σ Quick® (Tokuyama), Evolu-X® (Dentsply), Esthet-X HD® (Dentsply), Opallis® (FGM), Herculite XRV Ultra® (Kerr) and Filtek Z250® (3M/ESPE). Elastic modulus (EM) and flexural strength (FS) were determined by three-point bending of specimens immersed or not in absolute ethanol for seven days. Roughness (Ra) and gloss (G.U.) analyses were determined before and after ethanol storage for seven days and CIELAB color change (∆E*) was obtained with a spectrophotometer. Results were analyzed by two-way ANOVA (general linear model) for EM and FS, with repeated measures for roughness and gloss, and one-way ANOVA for ∆E*. All comparisons were performed by Tukey's test (5%). Pearsons' correlation test was performed to determine the correlation between EM, FS, roughness, gloss, and ∆E* with the mean filler sizes. Results: Mechanical properties decreased for all materials when submitted to immersion in ethanol. Increasing filler size gradually increased EM, FS and roughness values; gloss values decreased and didn't significantly affects ∆E*. Nanofiller composites presented higher gloss values than the others. Conclusions: It was possible to determine that the average filler size is a good predictor just for FS and gloss retention.

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Section: Surface Properties Analysesmentioning

confidence: 99%

Bulk and surface properties related to composite filler size

Gerhardt¹,

Silva²,

Rego³

et al. 2013

Braz. J. Oral Sci.

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“…Extrinsic compounds interact with the polymeric network in free volume spaces between polymer chains, resulting in colored oxidation products 8,23,24 . Urethane methacrylate, due to its low water sorption and solubility 6 , presents more resistance to staining than hydroxyl groups 25 .…”

Section: Discussionmentioning

confidence: 99%

“…Evaluating a non-opaque material, there is a tendency to result in a gray effect, as occurs using a black background 24 and in class III and IV restorations 27 . In this study, black and white backgrounds were used to avoid a gray effect in non-opaque sealant evaluation.…”

Section: Discussionmentioning

confidence: 99%

Effect of beverages on surface properties of resin-based sealants

et al. 2017

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Aim: The aim of this study was to determine degree of conversion of resin-based sealants and the effect of beverages on surface roughness and color change of materials. Methods: Two commercial resin-based sealants were evaluated (Defense Chroma ® and BioSeal ® ). Degree of conversion (DC) was initially measured using Fourier-transformed infrared (FTIR). Specimens of each sealant were maintained in distilled water and immersed one hour daily in grape juice and cola drink for 30 days. One group was maintained only in distilled water, as a control. Surface roughness and color change were measured before immersion, after seven days of immersion and after 30 days of immersion. Results were analyzed using t-test, paired t-test, one-way repeated measures ANOVA, one-way ANOVA and post-hoc tests (0.05 level of significance). Results: There was no significant difference regarding degree of conversion and initial surface roughness comparing both commercial sealants. Surface roughness increased for BioSeal ® immersed in cola drink for 30 days. After 30 days, all groups presented significant color change. Conclusions: The effect of beverages on color stability and surface roughness of resin-based sealants depended on exposure time and kind of beverage.

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“…It is known that the surface roughness, gloss retention and color stability are among the most important characteristics of surface texture that influence the appearance of composite resins and clinical performance. 1,[12][13][14][15] Color stability is vital for the longevity of direct restorations in esthetically important areas. 16 In vitro studies, [17][18][19][20] showed that resin-based composites are susceptible to staining and discoloration.…”

Section: 9mentioning

confidence: 99%

“…12,18,25,[34][35][36] The abrasion process usually occurs through the gradual removal of organic matrix, which ends up leaving the fillers without support and susceptible to exfoliation. 30 As a result, when particles of larger fillers are removed, a rougher surface is expected, hence materials with smaller fillers are more resistant to the abrasive process.…”

Section: Jcdpmentioning

confidence: 99%

Surface Texture and Optical Properties of Self-Adhering Composite Materials after Toothbrush Abrasion

Malavasi

Macedo

Souza

et al. 2015

The Journal of Contemporary Dental Practice

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This study evaluated the surface texture and optical properties of two self-adhering composites and a nanofilled composite before and after toothbrush abrasion. Vertise Flow (Kerr), Fusio Liquid (Pentron Clinical) and Filtek Z350 XT (3M ESPE) composites were divided into 3 groups (n = 6). Disks of 12 mm diameter and 2 mm thick were made. All materials were light-cured with a LED light source for 40 seconds. Analyses of surface roughness, gloss retention and color stability were performed 24 hours after light curing and after 20,000 brushing cycles. Data were analyzed with analysis of variance (ANOVA) and Tukey's test (α = 5%).Results: Tukey´s test ascertained that toothbrush abrasion resulted in rougher and matte surfaces for all composites tested. Filtek Z350 presented better gloss retention after abrasion. On surface roughness evaluation, there was no statistical difference between Fusio Liquid Dentin and Filtek Z350 resins (p > 0.05). Vertise Flow resin showed better color stability (ΔE), than the other two materials.Conclusion: Nanofilled material presented better gloss retention but it did not produce the best results in aspects related to surface roughness and color stability compared to self-adhering composites.

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The influence of nanoscale inorganic content over optical and surface properties of model composites

Cited by 51 publications

References 45 publications

Bulk and surface properties related to composite filler size

Bulk and surface properties related to composite filler size

Effect of beverages on surface properties of resin-based sealants

Surface Texture and Optical Properties of Self-Adhering Composite Materials after Toothbrush Abrasion

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