Color stability of dental composites as a function of shade

Uchida, Hirobumi; Vaidyanathan, J.; Viswanadhan, Trithala; Vaidyanathan, T.K.

doi:10.1016/s0022-3913(98)70147-7

Cited by 100 publications

(77 citation statements)

References 9 publications

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“…Positive values for the b* color coordinate in the case of TPH3 show increasing chroma and saturation as opposed to the negative values found for Z350. These data confirm the direct relationship between changes in color (ΔE) and b* color coordinate, a correlation also presented by Uchida et al (19). In the present study, the larger variations in color (ΔE) were directly related to an increase in variation of b* color coordinate, as evidenced by the tendency of TPH3 to yellowing.…”

Section: Discussionsupporting

confidence: 93%

Changes in surface roughness and color stability of two composites caused by different bleaching agents

et al. 2012

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The objective of this study was to evaluate the effect of two bleaching agents (10% and 35% hydrogen peroxide) on the color stability and surface roughness of two composites, one nanohybrid and one nanoparticle. Specimens were polished, aged, stained, bleached and polished again. The action of the bleaching agents on the composites was analyzed using a profilometer (surface roughness) and a spectrophotometer (color stability). The effect of polishing the composites on the surface roughness and the resumption of the composite color was also evaluated. The results were analyzed statistically by ANOVA and Tukey's test at 5% significance level. The analysis indicated that the nanohybrid composite was more affected by staining. The bleaching agents were not able to promote bleaching of either composite over the evaluation period. Surface polishing returned nanohybrid composite to its original color condition, which did not occur for the nanoparticle composite. Additionally, polishing did not return the surface roughness of either composite to its original value. It may be concluded that polishing surface after bleaching should not be the treatment of choice, as it was not possible to reverse the roughness of the composites to their original values, suggesting that a more extensive and irreversible degradation might have occurred.

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Section: Discussionsupporting

confidence: 93%

Changes in surface roughness and color stability of two composites caused by different bleaching agents

et al. 2012

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“…The shade of the composite is an additional factor because darker shades exhibit better color matching due to the presence of pigments. Conceivably, universal shades undergo a higher degree of color change 15,16 because of the absence of pigments. In addition, Uchida et al 16 reported that the greater discoloration associated with lighter shades might result from an environmental breakdown of the polymer, leading to the release of monomers and color change, or from an environmental effect on the retention of pigments and other additives.…”

Section: Discussionmentioning

confidence: 99%

Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions

et al. 2016

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Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions Abstract: Color match and water sorption are two factors that affect restorative materials. Discoloration is essential in the lifespan of restorations. The aim of this study was to evaluate color change and water sorption of nine flowable composites at multiple time points over 6 months. 60 samples of each composite were divided into two groups (Color Change and Water Sorption/Solubility). Each Color Change group was divided into six subgroups, which were immersed in distilled water (DW), coffee (CF), Coca-Cola (CC), red wine (RW), tea (TE) and orange juice (OJ). The color was measured at the baseline, 1, 2, 3 and 4 weeks, and 3 and 6 months and color change values ( . Vertise Flow showed the highest water sorption (W S = 69.10 ± 7.19). The Pearson test showed statistically significant positive correlations between water sorption and solubility and between water sorption and ∆E; the positive solubility-∆E correlation was not statistically significant. The findings suggest that water sorption is one factor associated with the ability of composites to discolor; however, discoloration is a multifactorial problem.

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“…On the other hand, intrinsic stains may also be due to an alteration of the material itself (e.g. oxidation of residual monomer) [9,10]. In this respect, the resin matrix composition with its hydrophilicity/hydrophobicity, filler load, size and nature of the particles [11], quantity of photo-initiator or inhibitor [12] and degree of conversion [13] have a strong influence on the stain intensity of composite resin.…”

Section: Introductionmentioning

confidence: 99%

Stain susceptibility of composite and ceramic CAD/CAM blocks versus direct resin composites with different resinous matrices

et al. 2016

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To evaluate the stain susceptibility of CAD/ CAM blocks and direct composite after long term exposure to various staining agents. 40 disk-shaped samples were fabricated from each of nine materials; six CAD/CAM (Vitablocs Mark II, Paradigm MZ100, Experimental Vita Hybrid Ceramic, Vita Enamic, Experimental Kerr and Lava Ultimate) and three direct composites (Filtek Supreme, Venus Diamond and Filtek Silorane). Samples were randomly divided into five groups (n = 8) according to different staining solutions (distilled water, tea, red wine, coffee and artificial saliva). Initial L*a*b* values were assessed using a calibrated digital spectrophotometer. Specimens were immersed in staining solutions and stored in an incubator at 37°C for 120 days. L*a*b* values were assessed again and color change (DE) was calculated as difference between recorded L*a*b* values. ANOVA, and Duncan test were used to identify differences between groups (a = 0.05). Significant differences in DE values were detected between materials (p = 0.000). Among all staining solutions, the highest DE value was observed with red wine. The new CAD/CAM blocks (Vita Enamic, Vita Hybrid Ceramic and Lava Ultimate) showed the highest resistance to staining compared to the MZ100 composite resin blocks. Filtek Silorane, a direct composite, showed high stain resistance values compared to CAD/CAM materials and other direct composites. Ceramic and composite CAD/CAM blocks had lower staining susceptibility than methacrylate based direct composite. Staining susceptibility of the new resin based CAD/CAM materials Vita Enamic and Lava Ultimate was comparable to feldspathic ceramic blocks (Vitablocs Mark II). Filtek Silorane showed promising results that were comparable to some CAD/CAM blocks.

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Color stability of dental composites as a function of shade

Cited by 100 publications

References 9 publications

Changes in surface roughness and color stability of two composites caused by different bleaching agents

Changes in surface roughness and color stability of two composites caused by different bleaching agents

Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions

Stain susceptibility of composite and ceramic CAD/CAM blocks versus direct resin composites with different resinous matrices

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