Effect of Hydrogen Peroxide Dentifrice and Brushing on Surface Properties of Direct Esthetic Dental Composites

摘要

The study aimed to evaluate the influence of 0.01% hydrogen peroxide (H2O2) containing dentifrice and brushing on color stability, micro-hardness, and surface roughness of resin based composites (RBCs). Twenty disks each (10 mm x 2 mm), for five different RBCs [IPS Empress (R) Direct (IPSE); Filtek (TM) Z350 XT (FZXT); Herculite, Kerr (EXRV); Aelite T (AA); and Esthet X (R) HD (EXHD)] were prepared. Each specimen was photo-polymerized for 40 seconds (sec). The specimens of each RBC were assigned randomly to two groups (n = 10) based on brushing specimens with distilled water or with dentifrice (0.01% H2O2). Surface roughness (Ra), color difference (Delta E), and Vickers micro- hardness (VHN) were measured before and after brushing. Data were analyzed using one-way ANOVA and Tukey's post hoc test. Surface roughness after brushing with dentifrice (H2O2) was significantly higher for FZXT and EXHD as compared to samples brushed with distilled water (p 0.05). Only IPSE exhibited significantly lower hardness value when brushed in the presence of dentifrice (H2O2) than distilled water (p 0.05). AA (p = 0.003) and HXRV (p = 0.002) showed significant change in color compared to controls (brushing with distilled water) when brushed with dentifrice (H2O2). In conclusion, brushing with whitening dentifrice containing 0.01% H2O2 had material specific adverse effect on surface properties of dental composite.