ArticleClinical oral investigations2026
Effect of gingival shade on the color matching of universal composite resins in Class V restorations: a photometric analysis.
Article in Clinical oral investigations, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesThe aim of this in vitro study was to evaluate the color matching of single-shade and group-shade universal composite resins used in Class V restorations on A3-shade teeth in the presence of different simulated gingival shades using a photometric analysis method. MATERIALS AND
methodsClass V cavities prepared on 45 extracted human anterior teeth were restored using one group-shade universal composite resin (Neo Spectra ST (NEO)) and two single-shade universal composite resins (Zenchroma (ZC) and Omnichroma (OC)) (n = 15). Standardized digital photographs were obtained under D65 illumination using cross-polarization filters. A commercial gingival shade guide providing three different gingival shades (light, medium, and dark) was used, along with a no-gingiva condition (control). The photographs were calibrated using a gray reference card in Lightroom software. Color differences (ΔE₀₀) were calculated using the CIEDE2000 formula. Data were analyzed using robust mixed ANOVA, with the level of significance set at p < 0.05.
resultsComposite resin type had a statistically significant effect on ΔE₀₀ values (p < 0.01). NEO (2.15 ± 0.067) exhibited lower ΔE₀₀ values compared with ZC and OC. Gingival shade alone did not significantly affect ΔE₀₀ values (p = 0.232); however, the interaction between composite resin type and gingival shade was statistically significant (p < 0.01).
conclusionAlthough the group-shade composite resin demonstrated better color matching than the single-shade composite resins, all ΔE₀₀ values observed in the study exceeded the clinically acceptable threshold (ΔE₀₀ > 1.8). CLINICAL RELEVANCE: When evaluating the color matching of universal composite resins in Class V restorations, the influence of gingival shade may vary depending on the composite resin used.
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