ReviewJournal of clinical and experimental dentistry2026
Influence of Polishing Protocols on Surface Roughness and Color Properties of a Zirconia-Based Nano-Hybrid Resin Composite.
Review in Journal of clinical and experimental dentistry, 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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Authors and funding
8 authors.
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Abstract
Background: This study evaluated the impact of polishing procedures on the surface texture and color stability of two nano-hybrid resin composites, with or without zirconia filler. Material and Methods: Cylindrical specimens (6 × 2 mm) were fabricated using a nano-hybrid resin composite containing zirconia (Forma, Ultradent) or a composite without zirconia (Empress Direct, Ivoclar Vivadent). Specimens were subjected to two finishing and polishing protocols (n = 12): aluminum oxide abrasive disks (Sof-Lex, 3M) or disk-shaped abrasive rubbers (Jiffy, Ultradent). Roughness (Ra, µm) and color (CIEL*a*b* system, CIEDE2000, Vita shade guide units [SGU]) were measured at baseline, after polishing protocol, and after immersion in coffee solution. Results: were evaluated using linear mixed-effects models for repeated measures, along with Tukey-Kramer, Mann-Whitney, Friedman, and Nemenyi tests ( = 0.05). Results: All groups exhibited an increase in Ra after polishing, with the highest values observed in specimens polished with abrasive rubbers (p < 0.05). SGU values significantly increased for both resin composites following coffee exposure, although the zirconia-based composite showed lower overall SGU changes (p < 0.05). After staining, Eab and E00 values were greater for the abrasive rubber groups compared to the aluminum oxide disk groups and were also higher for the non-zirconia resin composite compared to the zirconia-based material (p < 0.0001). Conclusions: Polishing with aluminum oxide abrasive disks resulted in smoother surfaces and reduced susceptibility to staining. Nevertheless, the zirconia-containing resin composite demonstrated superior color stability regardless of the polishing method.
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Registered trials
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