This in vitro study evaluated the biocompatibility and abrasivity of whitening conventional toothpastes. Samples (non-whitening) - Edel White Infant (EWI) toothpastes Whitening (EWW), CAREFORTE (EWC), Colgate Total 12 Ò Professional (C), Oral-B (OB) were dissolved culture medium (0.2 g sample weight per mL). Human gingival fibroblasts (hGF) placed contact with different dilutions media that had...

OBJECTIVE Evaluate the immediate and cumulative optical whitening efficacy of a blue covarine toothpaste. MATERIALS AND METHODS 180 bovine tooth specimens with similar shade (ΔE < 3.5) were staining of different beverage: black tea(BT), green tea (GT), red wine (RW), orange soda (OS), and brazilian açai juice (AJ), and then submitted to tooth brushing with a blue covarine toothpaste (Op) or a...

During the rice milling process, a huller system is used to remove rough rice hull, then abrasive or frictional mill product whitened rice. In such machines adjustment and control, operation is important, because breakage percentage of rice is one main factor in determination of quality. Today’s image processing techniques has become an increasingly popular and cost-effect...

BACKGROUND The tooth whitening substances for extrinsic use that are available in Brazil contain hydrogen peroxide or carbamide peroxide. Several studies have attributed the appearance of lesions in the enamel morphology, including hypersensitivity, to these substances. Such lesions justify fluoride therapy and application of infrared lasers, among other procedures. However, there is no consens...

Objective: This study aimed to assess the effect of different types whitening toothpastes on microhardness and surface roughness composite resins. Material Methods: 120 discshaped samples each Clearfil Majesty Esthetic Gradia Direct Anterior resins were randomly assigned 4 groups, based toothpaste used [three toothpastes: Signal White Now (SWN), Colgate Optic (COW), Ipana 3D Luxe (IWL), one non...

The present study was focused on improving the quality of rice koji by fermentation with a selected Aspergillus oryzae strain and a plant Astragalus radix. A. oryzae KCCM 60345 was used as main inoculant and the Astragalus radix was added as supplement in rice koji preparation. LC-MS based metabolite analysis and tyrosinase inhibitory activities were studied for different time periods. A. oryza...

OBJECTIVE To evaluate the relative abrasivity of different toothpastes and polishing pastes both qualitatively and quantitatively. MATERIALS AND METHODS Acrylic plates were exposed to brushing in a brushing machine with a toothpaste/water slurry for 1 and 6 h. Twelve different toothpastes were used and also four different polishing pastes. The results were evaluated using a profilometer after...