Objective: This study aimed to evaluate the effect of whitening toothpastes and mouthrinses on the color stability of teeth bleached with 16% carbamide peroxide (CP) after immersion in coffee solution. Materials and methods: Specimens obtained from bovine incisors were bleached with 16% CP for 14 days. After bleaching, the specimens were stained in coffee solution for 24 h and randomly divided ...

PURPOSE To evaluate the whitening efficacy of a new two-layer technology in-office system compared to a conventional gel-type system and determine hydrogen peroxide penetration (HPP) into the pulp cavity. MATERIALS AND METHODS Extracted molars (n = 60) were assigned to group NC: glycerol gel; group QPRO: 20% HP varnish (Zoom Quick Pro, Philips Oral Healthcare); group ZOOM_NL: 25% HP gel (Zoom...

In practice, the key whitening layer is a commonly adopted structure in symmetric ciphers, and the loop architecture is widely applied in hardware implementation of these ciphers. Up to now, conventional DPA is hard to recover the key of such ciphers, since the key whitening layer hides the input (output) of the first (last) round from the plaintext (ciphertext). In this paper, we propose a pra...

The present study was performed to compare the antioxidative and whitening activities of fermented soybean extract (FSB) and non-fermented soybean extract (SB). Antioxidative and whitening activities of FSB and SB were evaluated by the determination of DPPH, superoxide radical and hydroxyl radical scavenging activities, linoleic acid inhibition activity, and tyrosinase inhibition activity. FSB ...

4.35k1.86 15.48f3.21 Abstract Previous research showed that whitening the surface electromyogram (EMC) can improve EMG amplitude estimation. However, conventional linear-filter whitening fails at low EMG amplitude levels, perhaps due to additive background noise in the measured EMG signal. This paper describes an adaptive whitening technique, effective at low EMG levels, that cascades a non-ada...

Aim: Oral care probiotics that incorporate hydrogen peroxide-producing strains of Streptococcus oralis may represent an effective means of naturally whitening teeth, when whitening is indicated. The purpose of this study was to evaluate the cosmetic benefit (“whitening effect”) of a laboratory culture of S. oralis strain KJ3® and further investigate its mechanism of action. Methods: Ceramic dis...

Melasma (or chloasma) is a hyperpigmentation disorder predominantly affecting sun-exposed skin in women, and is often refractory to treatment. The objective was to evaluate the efficacy and safety of a new whitening formula for the treatment of chloasma. This single centre, double-blind, placebo controlled, bilateral (split-face) comparison, was conducted on 44 Chinese subjects with chloasma du...

PURPOSE Glutathione is a tripeptide consisting of cysteine, glycine, and glutamate and functions as a major antioxidant. It is synthesized endogenously in humans. Glutathione protects thiol protein groups from oxidation and is involved in cellular detoxification for maintenance of the cell environment. Reduced glutathione (GSH) has a skin-whitening effect in humans through its tyrosinase inhibi...

Aims The aim of this project was to evaluate the effects of 2 different whitening strips on color, microstructure and roughness of tea stained porcelain and composite surfaces. Methods 54 porcelain and 72 composite chips served as samples for timed application of over-the-counter (OTC) test or control dental whitening strips. Chips were divided randomly into three groups of 18 porcelain and 2...

PURPOSE Our study aimed to test the null hypothesis that whitening and non-whitening dentifrices affect similarly the surface roughness of commercial microhybrid composites, independent of the brushing time. MATERIALS AND METHODS One hundred and ninety-two disc-shaped specimens of Filtek Z250 (3 M/ESPE, St. Paul, MN, USA) and Rok (SDI, Australia) were built up and randomly assigned to 24 grou...