ArticleCureus2025
Comparative Evaluation of the Staining Resistance of Two Single-Shade Composites in Coffee and Chlorhexidine: A Spectrophotometric Analysis.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
1 citing paper in PubMed.
- Do modeling liquid and glycerin gel compromise the color stability of one-shade composites.Odontology · 2026Article
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionColor stability is a critical factor for the longevity of composite restorations, especially in esthetic dentistry. Single-shade universal composites have been designed to blend seamlessly with natural tooth structures. This study aimed to compare the staining resistance of Omnichroma (Tokuyama Dental, Tokyo, Japan) and Vittra Unique (FGM Dental Group, Joinville, Santa Catarina, Brazil) over a 30-day period using spectrophotometric analysis to assess color changes. The null hypothesis was that no significant difference would be observed between the two composites in terms of staining resistance. MATERIALS AND
methodsAn in vitro study was conducted using 40 disc-shaped composite specimens divided into two groups: Group A (Omnichroma) and Group B (Vittra Unique). Each group was further divided into two subgroups based on the staining solution used (coffee and 0.2% chlorhexidine). The specimens were prepared using standardized molds, light-cured, polished, and stored in artificial saliva for 24 hours prior to immersion. Each specimen was exposed to its respective staining solution for eight hours daily for 30 days, followed by rinsing and solution replacement. Thermal cycling was performed to simulate the oral conditions. Quantification of color alteration (ΔE values) was done using a spectrophotometer (Vita Easyshade 2.0, VITA Zahnfabrik, Germany) at baseline and after 30 days. Statistical analysis was conducted using independent t-tests and analysis of variance (ANOVA), with a significance level of p < 0.05.
resultsA significant difference in staining resistance was observed between groups (p = 0.001). Vittra Unique exhibited higher ΔE values than Omnichroma, indicating greater discoloration. The highest color change was found in the Vittra coffee subgroup (ΔE = 2.70 ± 0.56), while the lowest was in the Omnichroma coffee subgroup (ΔE = 1.25 ± 0.17). Chlorhexidine also caused staining, albeit to a lesser extent than coffee did.
conclusionOmnichroma demonstrated superior resistance to staining compared with Vittra Unique, particularly against coffee-induced discoloration. These findings suggest that Omnichroma may be a more suitable choice for patients frequently exposed to staining agents. Further research is recommended to explore the long-term color stability under varying conditions.
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