Effect of finishing and polishing systems on surface roughness and color stability of aesthetic restorations exposed to staining solution

• Published in: Acta odontológica latinoamericana Vol. 37; no. 2; pp. 162 - 171
• Main Authors: Alvarenga, Ana C Ferreira, Kantovitz, Kamila R, Turssi, Cecília P, Basting, Roberta T, Vieira-Junior, Waldemir F, França, Fabiana Mg
• Format: Journal Article
• Language: English
• Published: Argentina 30.09.2024
• Subjects: Coffee; Color; Composite Resins - chemistry; Dental Polishing; Dental Restoration, Permanent; Esthetics, Dental; Materials Testing; Surface Properties; composite resins; acids; color; surface properties
• ISSN: 1852-4834; 1852-4834
• DOI: 10.54589/aol.37/2/162

The color and the surface roughness of aesthetic restorations are related to the clinical sucess and longevity of these treatments. Aim: This study evaluated the influence of finishing and polishing systems, and storage media on the surface roughness and color stability of aesthetic restorative composites. Materials and Method: Cylindrical specimens (n=10) were prepared and treated according to: 1. Type of composite resin (nanofilled- Filtek Z350XT, suprananofilled- Estelite Omega, nanohybrid- Empress Direct); 2. Type of finishing and polishing systems (no polishing, aluminum oxide discs or abrasive rubber polishers); and 3. Type of immersion medium (water or coffee, 3 h/day/30 days). Surface roughness (Ra - μm) and color stability (L, ΔEab, and ΔE00) were evaluated at baseline (after polishing) and final time (after immersion). Data were subjected to Kruskal-Wallis, Mann-Whitney, Wilcoxon, and Student-Newman-Keuls tests (α=0.05). Results: Nanohybrid (p<0.001) and suprananofilled composite resins (p=0.004) showed an increase in Ra after polishing, regardless the finishing and polishing system. After immersion in coffee, the nanofilled composite had the highest roughness values (p=0.032). L values increased for all resins after polishing (p<0.05). Suprananofilled composites had the greatest color stability with the lowest values of ΔEab and ΔE00. Conclusions: Finishing and polishing systems had an impact on the surface roughness and color stability of all aesthetic resins, and their effectiveness depended on the type of composite resin.