OBJECTIVES This study evaluated the influence of different exposure times to saliva in situ in comparison with an antioxidant treatment on composite resin bond strength to human enamel restored after tooth bleaching. MATERIAL AND METHODS Forty human teeth specimens measuring 5x5 mm were prepared and randomly allocated into 5 groups with 8 specimens each: Gct (control group, restored on unblea...

A novel electrochemically and fluorescence active boronic ester sensor molecule has been developed containing ferrocene and naphthalimide as the redox and fluorophore units. The combinations of iron (Fe(3+)) ions, sodium L-ascorbate, and fluoride (F(-)) ions can be used to produce a molecular system displaying INHIBIT logic, due to indirect fluorescence quenching.

BACKGROUND Studies have shown a reduction in bond strength of composites and glass ionomer to bleached enamel and dentin. Several methods have been proposed to reverse compromised bond strength. OBJECTIVE The aim of this study was to evaluate the effect of delayed bonding and application of antioxidant agent on the bond strength of reinforced self-cured (Fuji IX) and light-cured glass ionomer...

Background and aims. Studies have shown decreased bond strength of composite resin to human and bovine bleached enamel. This study evaluated the effect of sodium ascorbate and delayed bonding on the bond strength of two adhesive systems to bleached enamel. Materials and methods. The labial surfaces of 150 sound bovine incisor teeth were abraded with abrasive paper. The teeth were randomly divid...

Treatment of mice bearing P388 lymphocytic leukemia with combined hydroxocobalamin (0.1 mmol/kg) and sodium ascorbate (1.0 mmol/kg) for 10 consecutive days resulted in 70% increase in survival. Treatment with dehydroascorbate (1.0 mmol/kg) similarly increased survival. The extended treatment for 15 days posttumor inoculation failed to improve survival as did lowering the tumor inocula from 10(6...

Efficient regioselective synthesis of nucleoside conjugates was achieved by cycloaddition reaction of azides and alkynes using sodium ascorbate/ CuSO4 system as a catalyst. These 16 novel thymidine analogues were obtained in excellent yields (75-100%), employing mild reaction conditions with a broad scope of structural modification. For the compounds tested, no specific antiviral effects could ...

Banana pseudo-stem (BPS), which is rich in fibre and polyphenols, a potential functional ingredient for the food industry. In this study, BPS was added at concentrations of 1.5, 3.0, 4.5 g/kg to minced pork batter evaluate its performance as filler burger patties natural antioxidant. The effects were compared with those carrageenan ascorbate, are conventional binder antioxidant, respectively. s...

BACKGROUND Tooth restoration immediately after bleaching is challenging due to the potential problems in achieving adequate bond strength. OBJECTIVE The aim of this study was to evaluate the effect of surface treatment with ER:YAG, ND:YAG, CO2 lasers and 10% sodium ascorbate solution on immediate microtensile bond strength of composite resin to recently bleached enamel. MATERIALS & METHODS ...