ArticleBMC oral health2026
Assessment of bleaching procedures on the optical properties, surface roughness and microhardness of single-shade resin composites: an in-vitro study.
Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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.
The trial behind it
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
2 citing papers in PubMed.
- Effects of surface treatment methods on the color stability, whiteness, and surface roughness of bleach-shade composite resins.BMC oral health · 2026Article
- Effects of different intensities of the light-curing unit on the color change of bleach shade resin composites after immersion in coffee.BMC oral health · 2026Article
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo evaluate the effects of bleaching on the optical properties, surface roughness, and microhardness of various single-shade resin composites. MATERIALS AND
methodsA total of 210 disc-shaped specimens (6 mm × 2 mm) were fabricated using seven single-shade resin composites (Clearfil Majesty ES-2 Universal, Essentia Universal, Vittra Unique, Charisma Topaz One, OneShade, Omnichroma, and Zenchroma) (n = 30 / group). After 24 h of storage in distilled water at 37 (±) 1 °C, all specimens were immersed in a coffee solution for 144 h. Color change (ΔE
resultsAll restorative materials exhibited color changes exceeding both the perceptibility (PT > 0.8) and the acceptability (AT > 1.8) thresholds. The highest discoloration was observed in the VU*CP subgroup (9.05 ± 1.05), while the lowest was observed in the ZC*HP subgroup (1.85 ± 0.43). Both mean Ra and VHN values differed significantly among the restorative materials, regardless of bleaching agent and time-period (p < 0.001).
conclusionAll tested single-shade resin composites exhibited perceptible and clinically unacceptable color changes. The HP bleaching agent demonstrated the greatest negative effects on surface roughness and microhardness, while among the single-shade resin composites, CME and EU showed the highest degree of susceptibility to these effects. The interactions between restorative materials and bleaching agents should be taken into account when planning the bleaching of restored teeth.
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Registered trials
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