Effect of Hydrogen Peroxide Dentifrice and Brushing on Surface Properties of Direct Esthetic Dental Composites
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 × 2 mm), for five different RBCs [IPS Empress® Direct (IPSE); Filtek™ Z350 XT (FZXT); Herculite, Kerr (EXRV); Aelite™ (AA); and Esthet X®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 (ΔE), 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.
Dual-cure resin cements are the major resin-cement type used to bond indirect restorative materials to remaining tooth structure. Adequate polymer network properties of dual-cure cements are…
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 (…
Abstract: Objective
To explore the effect of different curing modes of conventional and self-adhesive dual-cure resin cements on their rates of thermal decomposition, hardness development…