Effect of modeling liquids on resin composite roughness and color parameters after staining and toothbrushing

• Published in: Brazilian oral research Vol. 37; p. e024
• Main Authors: Maia, Thaís Souza, Lima, Thamires Diogo, Ramos, Vanessa Miranda, Faria-E-Silva, André Luís, Menezes, Murilo de Sousa
• Format: Journal Article
• Language: English
• Published: Brazil Sociedade Brasileira de Pesquisa Odontológica - SBPqO 01.01.2023; Sociedade Brasileira de Pesquisa Odontológica
• Subjects: Color; Composite Resins - chemistry; DENTISTRY, ORAL SURGERY & MEDICINE; Materials Testing; Spectrophotometry; Staining and Labeling; Surface Properties; Toothbrushing; Wine; Wine; Toothbrushing; Color
• ISSN: 1806-8324; 1807-3107; 1807-3107
• DOI: 10.1590/1807-3107BOR-2023.VOL37.0024

This study evaluated surface roughness, color stability, whitening index, and opacity of different types of modeling liquids for resin composite coating after exposure to staining and toothbrushing. Disc-shaped resin composite (Vittra APS, FGM) specimens were fabricated and divided into four groups (n = 10 each): control group, Composite Wetting resin (Ultradent Products), Adper Scotchbond Multipurpose adhesive (3M ESPE), and Adper Universal adhesive (3M ESPE). Surface roughness (Ra) was measured using a rugosimeter, while color stability (∆E00), whitening index (WI), and opacity (%) were measured using a spectrophotometer. Assessments were made at four time points: after polishing (baseline, T1), after immersion in red wine for 24 h (T2), and after 5,000 (T3) and 10,000 (T4) cycles of toothbrushing. Scanning electron microscopy images were captured to analyze the scratches created. The data were statistically analyzed by two-way repeated-measures analysis of variance and Tukey's honestly significant difference tests (α = .05). Modeling with the Wetting resin resulted in higher surface roughness (p < 0.05) and low color stability, which were attributable to porosities. Higher color change values were observed in the control group after staining. Both adhesives showed the lowest mean ΔE00 values (p < 0.005). WI decreased after staining, except with the use of the Universal adhesive (p < 0.005). The lowest opacity values were observed at baseline for all groups (p < 0.005). The Universal and Scotchbond adhesives had lower surface roughness, better color stability, higher WI, and the lowest opacity values after staining with red wine and toothbrushing.