Influence of surface roughness of universal shade resin composites on color adjustment potential

Hayashi, Kazuhiro; Kurokawa, Hiroyasu; Saegusa, Makoto; Aoki, Ryota; Takamizawa, Toshiki; Kamimoto, Atsushi; Miyazaki, Masashi

doi:10.4012/dmj.2023-007

Cited by 7 publications

(2 citation statements)

References 30 publications

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“…Aesthetic resin composites with improved translucency and enhanced structural integrity provided better blending capabilities, which blended into the teeth even if the shade picked was a little off [5,6]. Shortly after the application of aesthetic resin composites, universal-shade resin composites are born on demand marketably, universal-shade is only single shade, which is expected to match nearly all shades of the surrounding tooth [4,7]. Some researches have reported that universal-shade type of resin composites revealed barely indistinguishable color difference compared to the conventional types of resin composites [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Shortly after the application of aesthetic resin composites, universal-shade resin composites are born on demand marketably, universal-shade is only single shade, which is expected to match nearly all shades of the surrounding tooth [4,7]. Some researches have reported that universal-shade type of resin composites revealed barely indistinguishable color difference compared to the conventional types of resin composites [7,8]. The optical properties such as re ectance and opalescence characteristic of universal-shade resin composites vary among materials [8].…”

Section: Introductionmentioning

confidence: 99%

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Physico-mechanical properties of aesthetic resin composites

Chen,

Wang,

Luo

et al. 2024

Preprint

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Objectives To evaluate the physico-mechanical properties, including water sorption (WS) and solubility (SL), flexural strength (σf) and modulus of elasticity (Emod), as well as Vickers hardness (VHN) value of most currently available aesthetic resin composites by comparing them with conventional resin composite. Materials and methods Universal-shde resin composite OMNICHROMA (OMNI; Tokuyama), Beautifil Unishade (BU; Shofu), Essentia (EN; GC), and A3 shade of aesthetic resin composites Harmonize (HM; Kerr), conventional resin composite Tetric N Cream (TNC; Ivoclar Vivadent) were evaluated in this study. Volume and weight were recorded every 24 h of water immersion of resin composites (n = 5) for the calculation of WS and SL. Bar shaped specimens were sectioned from each material (n = 5), Emod and σf were evaluated using a three-point bending test. Bottom and top of the specimens (n = 3) of VHN were obtained for three spots using Vickers micro-hardness tester. Afterwards, bottom-top hardness ratio was calculated. One-way ANOVA, Tukey’s test, Kruskal-Wallis, Pearson’s correlation test, and Paired-samples t-test were computed (p < 0.05). Results HM showed significant the highest WS and SL (p < 0.05). There was no significant difference in σf regarding the materials (p > 0.05). BU showed significant the highest Emod (p < 0.05). HM recorded the highest VHN value (p < 0.05), and significantly the lowest bottom-top hardness ratio (p < 0.05). Conclusions The aesthetic resin composites showed comparable physico-mechanical properties compared to conventional resin composite TNC. Clinical relevance The physico-mechanical properties of resin composite material influence the long-term clinical performance of the restoration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physico-mechanical properties of aesthetic resin composites

Chen,

Wang,

Luo

et al. 2024

Preprint

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Effect of Repolishing on Color Stability, Translucency, and Surface Roughness of Aged Monochromatic Dental Composites

Abdul-Monem,

Hussein,

Abdelrehim

2024

European Journal of General Dentistry

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Objective This study aimed to test repolishing effect on color stability, translucency, and surface roughness of aged monochromatic dental composite in artificial saliva, tea, mouthwash, and coffee after 1 month, simulating 2.5 years of clinical use. Materials and Methods Omnichroma, a monochromatic dental composite, and Z250 XT a nanohybrid multishade dental composite were used in this study. Specimens (n = 80) from each dental composite were prepared to determine color stability, translucency parameter, and surface roughness after repolishing of aged specimens in artificial saliva, tea, mouthwash, and coffee for 1 month. Scanning electron microscope and laser scanning microscope were used to study surface topography after repolishing. Data was analyzed using analysis of variance, Scheffe test, and independent t-test. Results A significant difference between both dental composites after repolishing in terms of color stability and translucency parameter as that of Omnichroma was higher but sill color changes of Omnichroma were perceptible. There was no difference between both composites in regard to surface roughness after repolishing; however, values of both composites were above the accepted value of 0.2 µm and laser scanning microscope images confirmed these findings. Conclusions Repolishing did not enhance color and surface roughness of aged monochromatic dental composites.

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Influence of in‐office whitening on the color matching and surface characteristics of single‐shade resin composites

Sugimura,

Takamizawa,

Aoki

et al. 2024

J Esthet Restor Dent

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ObjectiveThe color matching of single‐shade resin composites after in‐office whitening was investigated.Materials and MethodsFour single‐shade resin composites were used. A total of 35% hydrogen peroxide was used as the whitening agent. The resin composite was placed in a cavity of an artificially discolored bovine tooth. The color differences between the restoration and surrounding enamel before and after whitening were determined based on ΔE*ab, ΔE00, and ΔWID. The color stability, surface roughness (Sa), and surface gloss (GU) of the resin composite alone were also evaluated. Statistical analyses were performed using repeated‐measures analysis of variance with the Tukey–Kramer test.ResultsBased on the 50:50% of perceptibility and acceptability thresholds of ΔE*ab and ΔE00, none of the resin composite restorations were clinically acceptable before or after whitening. Regarding ΔWID, although all resin composites showed “acceptable match” in the baseline, they showed “mismatch” after the third session of whitening. Most of the resin composites alone were stable in color against whitening.ConclusionsAlthough the single‐shade resin composites failed to achieve the expected color matching on discolored teeth either before or after the whitening, the impact of the whitening on the color of the resin composite alone may be negligible.

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Influence of surface roughness of universal shade resin composites on color adjustment potential

Cited by 7 publications

References 30 publications

Physico-mechanical properties of aesthetic resin composites

Physico-mechanical properties of aesthetic resin composites

Effect of Repolishing on Color Stability, Translucency, and Surface Roughness of Aged Monochromatic Dental Composites

Influence of in‐office whitening on the color matching and surface characteristics of single‐shade resin composites

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