The effect of SARS-CoV-2 effective mouthwashes on the staining, translucency and surface roughness of a nanofill resin composite

Purpose: To evaluate the effect of SARS CoV-2 effective mouthwashes on the color change (ΔE), translucency parameter (TP) and average surface roughness (Ra) of a nanofill resin composite (Filtek Ultimate).

Methods: 91 composite specimens (10 mm in diameter, 1 mm thickness) were prepared using a stainless-steel mold and randomly divided to seven groups as follows: Group 1 (CHX) : 0.12% CHX digluconate + 0.15% benzydamine hydrochloride (96% alcohol), Group 2 (HAc): hypochlorous acid (500 ppm), Group 3 (PVP-I) : 1% povidone iodine, Group 4 (H2O2) : 1.5% hydrogen peroxide, Group 5 (CHX + C) : 0.09% chlorhexidine digluconate + cyclodextrin + citrox, Group 6 (CPC) : 0.075% cetylpyridinium hydrochloride, Group 7 (Control) : artificial saliva. The initial color values were determined by a spectrophotometer on both white and black backgrounds. The specimens were immersed in 20 mL mouthwash for 1 minute with a 12-hour interval. The Ra, ΔE and TP were determined after 1, 2 and 3 weeks. Data were analyzed using repeated measures ANOVA, one-way ANOVA, post-hoc Bonferroni and Tukey tests (P< 0.05).

Results: The highest and the lowest ΔE3 (after 3 weeks) value were observed in H2O2 (1.57± 0.29) and CHX (0.92± 0.17) groups, respectively. The CHX and CPC groups demonstrated significantly lower ΔE3 values than the control group (P< 0.05). CHX, HAc and PVP-I significantly affected the TP (P< 0.05). None of the groups demonstrated any significant changes of Ra scores (P> 0.05).

Clinical significance: Within the limitations of this study some of the mouthwashes affected the ΔE and TP of the Filtek Ultimate nanofill resin composite. The Ra was not affected by any of the mouthwashes.