Background and Aim: Bleaching agents differently affect the color of composite restorations. This study aimed to assess the effect of two different bleaching agents on color change of silorane-based and two types of methacrylate-based composites. Materials and Methods: This in-vitro study was conducted on 18 disc-shaped specimens measuring 10×2mm made of A3 shade of Z250, Z350 and P90 composite...

Introduction: Discoloration of resin composites is a common reason for replacement of these restorations. The aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite.  Materials and Methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek Z250 resin composite. Specimens wer...

Exploring the transformational potential of industrial biotechnology on the way to a green economy Foreword 2 executive summary 3 rethinking the climate change challenge 4 doing more with less 5 doing more oF the right things 6 industrial biotechnologies' path to a low carbon economy 7 IMproved effIcIency 9 swItchIng to bIofuels 11 replacIng petrocheMIcals wIth bIobased MaterIal 13 closIng the ...

Background and Aim: Shade guide discoloration after disinfection can interfere with the appropriate color selection for dental restorations. Since one of the most important issues for patients is the color of the final restoration, the discoloration of shade guides due to disinfectants will be important. Infection control is a definite and important matter in dentistry. Due to the contradictory...

In line with the Comission's commitment to transparent and interactive policy-making, this documents aims at providing an overview and general impression of the feedback provided to the Commission in the context of a public consultation. The statements and opinions expressed in the document do therefore in no way necessarily reflect those of the Commission.

4-methylimidazole (4-mei) is a simple nitrogen-containing heterocyclic compound, and recently classified as group 2b by international agency for research on cancer (iarc). caramel coloring is widely applied food coloring in many food products including coffee, carbonated beverages, beer and wine. in present study, ɣ-irradiation was applied to caramel color iii to reduce the level of 4-mei witho...

BACKGROUND AND AIM: The aim of this study was to evaluate the effectiveness of different whitening toothpastes, focusing on the experimental ozonated toothpaste. MATERIALS AND METHODS: This laboratory study included a sample of 48 sound human molar teeth. Teeth were randomly assigned into four groups according to toothpaste treatment to be evaluated objectively (colorimetric method) and subject...

One approach to change detection that is insensitive to illumination brightness and spectral changes uses properties of color imagery. This approach does not appear to have been previously investigated, and this paper asks: “What is the most appropriate metric for detecting changes in color imagery?”. We define and compare six image difference functions, mainly based on RGB and HSV image repres...

Along with subterranean maps, the new site will also include environmental data that will help users gather more data on climate change. “In discussions about climate change, the world’s oceans are often overlooked despite being an integral part of the issue. About one third of the carbon dioxide that we emit into the atmosphere ends up in the oceans,” says Schmidt. It was no coincidence that A...