Color adjustment potential of single-shade resin composite to various-shade human teeth: Effect of structural color phenomenon

Kobayashi, Shun; Nakajima, Masatoshi; Furusawa, Kiyoka; Tichý, Antonín; Hosaka, Keiichi; Tagami, Junji

doi:10.4012/dmj.2020-364

Cited by 43 publications

(40 citation statements)

References 47 publications

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“…Within the limitations of this study, Omnichroma was used as a single-shade resin composite, being one of the most clinically successful single-shade composites. It is considered one of the most widely researched singleshade material, with several research work investigating its color adjustment potential [6,9,[20][21][22], and optical properties [23,24]. The color stability of Omnichroma under accelerated aging conditions using Xenon Arc UV light sources to simulate exposure to natural sunlight [25] and 1 week staining in tea [26] were also investigated.…”

Section: Discussionmentioning

confidence: 99%

Effect of two artificial aging protocols on color and gloss of single-shade versus multi-shade resin composites

2022

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The long-term color stability and gloss retention of resin composites are among the crucial factors that affect the clinical longevity of esthetic restorations, especially in anterior teeth. This study evaluated the effect of artificial aging by immersion in different storage media and thermocycling on color and gloss of dental single-shade resin composite (Omnichroma) versus multi-shade one (Filtek Z350XT). One hundred resin-composite disc-shaped specimens were used, 50 from each group, Omnichroma and Filtek Z350XT. Ten specimens from each material acted as control group (incubated in saliva). For each material, 40 specimens were divided according to the artificial-aging protocol (immersion at 37 °C for 12 days or thermocycling for 10,000 cycles) and storage media (tea, red wine). Color and gloss were measured before and after artificial aging. Color difference (∆E00) was compared with perceptibility threshold and acceptability threshold. Data were statistically analyzed; independent t test was used to compare results between two tested materials, while two-way ANOVA was used to compare results among the different immersion media within the same material. Artificial aging (immersion or thermocycling) in tea and red wine led to significant color changes and gloss reduction in both materials (P < 0.05), in contrast to control group. Red wine produced highest color differences. Both dental resin-composites; the single-shade (Omnichroma) and multi-shade (Filtek Z350XT) displayed unacceptable discoloration and gloss reduction after artificial-aging in tea and red-wine by immersion or thermocycling simulating one-year clinical-service.

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Section: Discussionmentioning

confidence: 99%

Effect of two artificial aging protocols on color and gloss of single-shade versus multi-shade resin composites

2022

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“…More specifically, universal chromatic RBCs were developed to adapt aesthetically to every situation and every patient in order to do justice to the variety of shades of the teeth and restorations [ 9 , 10 ]. An improved blending effect of such RBCs into the environment has indeed been attested [ 11 , 12 , 13 ], with the caveat, however, that this effect is cavity-size dependent [ 14 , 15 , 16 ]. The way in which color is created in universal chromatic RBCs is innovative, as it is not only induced by selective light absorption via pigments, as usual in dental materials, but also by selective light reflection via particularized microstructures [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Universal Chromatic Resin-Based Composites: Aging Behavior Quantified by Quasi-Static and Viscoelastic Behavior Analysis

Ilie¹

2022

Bioengineering

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Universal chromatic dental resin-based composites were recently developed in an attempt to speed up the restoration process with the aim of making it easier for the practitioner to decide on a suitable shade and to avoid time-consuming matching and mixing of materials. The way in which color is created in the analyzed universal chromatic materials is innovative, as it is not only induced by selective light absorption via pigments (Venus Diamond ONE, Venus Pearl ONE), as is usual in regular composites (Charisma Classic, Charisma Topaz, Venus, Venus Diamond), but also by selective light reflection via particularized microstructures (Omnichroma). Material properties were assessed at 24 h post-polymerization and after artificial aging. Flexural strength (n = 20) and modulus were measured in a 3-point-bending test and complemented with fractography and Weibull analysis. Quasi-static (Martens, Vickers, and indentation hardness; elastic and total indentation work; creep, indentation depth) and viscoelastic (storage, loss, and indentation moduli; loss factor) behavior (n = 6) was measured by a depth-sensing indentation test equipped with a DMA module. The nanoscale silica/zirconia polymer core-shell structure in the structural-colored material induces similar or poorer mechanical properties compared with pigment-colored materials, which is related to the higher polymer content. For all materials, aging shows a clear influence on the measured properties, with the degree of degradation depending on the measurement scale.

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“…4 A comparison between a single-shade composite and two pigmented ones demonstrated a stronger chameleon effect in the former. 5 In the same study, a contribution of structural color to the chameleon effect was suggested.…”

Section: Introductionmentioning

confidence: 87%

Dental composites for wide color matching

Humbel

Mattle

Scheel

et al. 2022

Bioinspiration, Biomimetics, and Bioreplication XII

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Dental fillings are selected according to the color of the patient's tooth. Therefore, the dentists have around a dozen colors for each product in stock. Still, after a certain period of time, the choice could become suboptimal as the hard tooth tissue alters, for example, owing to specific habits such as smoking. Nanotechnology-based composites can at least partially master this deficiency. Similar to a chameleon, a filling with such a composite can match the color of the surrounding enamel. In this study, we thoroughly investigated the nanostructure of one such composite and the related optical properties. The size of the spherical silica-zirconia fillers and their arrangement in micrometer-sized domains was examined using electron microscopy, synchrotron radiationbased nanotomography and small-angle X-ray scattering. The optical properties were derived from transmission measurements ranging from the ultraviolet to the infrared spectrum. Isotropic dielectric homogenization was used to model the optical properties based on the nanostructure. We could deduce the diameter of the spheres, which corresponds to 260 nm. The spheres show a narrow size distribution and form micrometer-sized domains with close-packed nanospheres along their borders. Homogenization was not sufficient to predict all features of the transmission spectrum. The gathered structural information is a basis to gain deeper understanding of the chameleon effect and the methodology can be applied to other single-shade dental composites.

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Color adjustment potential of single-shade resin composite to various-shade human teeth: Effect of structural color phenomenon

Cited by 43 publications

References 47 publications

Effect of two artificial aging protocols on color and gloss of single-shade versus multi-shade resin composites

Effect of two artificial aging protocols on color and gloss of single-shade versus multi-shade resin composites

Universal Chromatic Resin-Based Composites: Aging Behavior Quantified by Quasi-Static and Viscoelastic Behavior Analysis

Dental composites for wide color matching

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