Results: 82

Color stability of a bulk-fill composite resin light-cured at different distances

Abstract The aim of this in vitro study was to evaluate the color stability of a bulk-fill (Filtek One Bulk Fill, 3M ESPE) and a conventional (Filtek Z350 XT, 3M ESPE) composite resin light-cured at different distances, before and after being submitted to staining with a coffee solution. Sixty specimens ...

Evaluation of the effect of tooth polishing on color stability after in-office bleaching treatment

Introduction: One of the most commonly used corrective methods for staining teeth is tooth bleaching. However, subclinical alterations may occur in the micromorphology of dental tissues during the bleaching procedure, such as increases in porosity and surface roughness. Consequently, dental enamel may be...

Effect of tooth enamel staining by coffee consumption during at-home tooth bleaching with carbamide peroxide

Introduction: Obtaining the result expected during tooth bleaching requires a correct diagnosis of the type of staining presented. The causes of tooth staining differ depending on the etiological factor. Objective: To assess the color change caused by the immersion of bovine teeth in coffee solution dur...

Marginal staining of ultra-thin ceramic veneers

Braz. j. oral sci; 19 (), 2020
The pigmentation of the resin cement at the tooth/ceramic interface compromises the esthetic and longevity of ultra-thin ceramic veneers. Aim: The aim of this study was to evaluate marginal staining of ultra-thin ceramic veneers cemented to intact enamel (non-prepare...

Characterization of Roasted Coffea arabica Species by the Relationship Between Caffeine and Diterpenes Contents

Abstract Commercial roasted and ground coffees are usually blends of Coffea arabica and Coffea canephora. Considering the differences in price and sensory characteristics between these two species, the identification of the presence of each species in commercial blends is of great interest. The aim of th...

Phenolic compounds profile, neuroprotective effect and antioxidant potential of a commercial Turkish coffee

Rev. Nutr. (Online); 33 (), 2020
ABSTRACT Objective The purpose of this study is to determine the phenolic and flavonoid contents, and antioxidant activities and neuroprotective effects of powdered coffee sample of a commercial coffee brand originated from Sivas, Turkey. Methods Total phenolic, flavonoid and antioxidant contents, enzy...

Psicoestimulantes menores consumidos por estudiantes de la Universidad San Francisco Xavier de Chuquisaca, 2019

Bio sci. (En línea); 3 (5), 2020
El objetivo del estudio fue determinar el consumo de psicoestimulantes en estudiante de la Universidad San Francisco Xavier de Chuquisaca. Se recolectaron los datos mediante encuestas aplicadas a 331 estudiantes. El estudio reveló el psicoestimulante de mayor consumo con 31,88% el café y la coca cola c...

¿Es necesario el ayuno para la determinación del perfil lipídico?

El propósito de este estudio fue analizar los cambios post prandiales en el perfil lipídico en respuesta a una comida típica argentina. Se extrajo sangre a 33 mujeres voluntarias después de 12 h de ayuno (T0), 1 h después de un desayuno estandarizado (T1) y 1 h después de un almuerzo estandarizado ...

Caracterización del consumo de drogas legales en jóvenes universitarios del Área Norte de Palma Soriano

Edumecentro; 11 (4), 2019
RESUMEN Fundamento: estudios realizados en el mundo expresan la prevalencia del consumo de drogas con predominio del alcohol, tabaco y tranquilizantes en el sector estudiantil universitario, con riesgo para la salud de miles de jóvenes. Objetivo: caracterizar elementos comportamentales relacionados ...

Synthesis of enriched biochar as a vehicle for phosphorus in tropical soils

Acta amaz; 49 (4), 2019
Phosphorus (P) is one of the nutrients that most limits agricultural productivity, especially in tropical soils. Enriched biochar has been proposed to increase the bioavailability of P and other nutrients in the soil. Thus, the objective of this study was to evaluate the availability of P in phosphate bi...