Results: 69

Can bulk-fill compromise the curing potential in deep cavities?

Braz. dent. sci; 25 (2), 2022
Objective: To determine the effect of the restorative technique, material’s opacity and the selected light sources on the curing potential (CP) in deep cavities. Material and Methods: The radiant exitance (mW/cm2) of two light curing units (Bluephase G2 and Radii-Cal) was determined at 0...

Como as características dos LEDs de segunda e terceira geração podem influenciar a dureza de compósitos restauradores: uma revisão da literatura

RFO UPF; 26 (2), 2021
Objetivo: Várias fontes de luz têm sido utilizadas desde que os materiais fotoativados foram introduzidos na odontologia. Diodos emissores de luz (LEDs) se popularizaram como a principal opção para a polimerização dos materiais restauradores. O objetivo nessa revisão da literatura foi avaliar a in...

Light transmittance and depth of cure of a bulk fill composite based on the exposure reciprocity law

Braz. dent. j; 32 (1), 2021
Abstract The objective of this study was to evaluate the effect of the exposure reciprocity law of a multi-wave light-emitting diode (LED) on the light transmittance (LT), depth of cure (DOC) and degree of conversion in-depth (DC) of a bulk fill composite. A bulk fill composite (EvoCeram® bulk fill, Ivo...

Polywave And Monowave Light-Curing Units Effects On Polymerization Efficiency Of Different Photoinitiators

Braz. dent. sci; 24 (4), 2021
Objective: The objective of this study was to characterize and correlate the absorption spectra of three photoinitiators [camphorquinone (CQ), diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO) and phenylbis (2,4,6-trimethylbenzoyl)-phosphine oxide (BA...

Influence of radiant exposure values from two third generation LED curing units on polymerization profile and microhardness of orthodontic composite under ceramic and metallic brackets

ABSTRACT Introduction: Third generation of LED light curing units might be used in short exposure periods for orthodontic brackets bonding. Objective: This study evaluated the effect of the different radiant exposure (RE) values: Manufacturers' instructions (MI), ½ MI, 1/4 MI and Turbo mode. Two thir...

Efeito da polimerização adicional com micro-ondas na rugosidade superficial de duas resinas compostas

RFO UPF; 25 (1), 2020
Introdução: a resina composta é um dos materiais restauradores mais pesquisados na Odontologia, visando melhorias nas suas propriedades e aperfeiçoamento da técnica. Este trabalho tem o objetivo de avaliar a rugosidade superficial de duas resinas compostas, micro-híbrida e nanoparticulada, após a ...

Effects of curing modes on depth of cure and microtensile bond strength of bulk fill composites to dentin

J. appl. oral sci; 28 (), 2020
Abstract Objectives To compare the microtensile bond strength (µTBS) and depth of cure (DOC) of bulk-fill composites cured by monowave (MW) and polywave (PW) LED units using different curing times. Methodology Three composites were tested: Tetric EvoCeram Bulk Fill (TBF), Filtek Bulk Fill (FBF), and...

Produção científica em laser / LED na odontologia brasileira no período de 2015 a 2019

Arq. odontol; 56 (), 2020
Objetivo:Investigar o perfil das publicações brasileiras em laser/LED de 2015 a 2019. Métodos: Foi realizado um estudo observacional, por meio de documentação indireta, através da análise dos trabalhos apresentados nas reuniões do SBPqO de 2015 a 2019. Os estudos foram classificados quanto à ins...

Accuracy of irradiance and power of light-curing units measured with handheld or laboratory grade radiometers

Braz. dent. j; 30 (4), 2019
Abstract This study measured and compared exitance irradiance and power of 4 commercial dental light-curing units (LCU) (Elipar S10, Elipar DeepCure-S, Corded VALO and Bluephase Style) using different types of radiometers. The devices used to analyze the LCU were classified as either handheld analog (Hen...

Impacto de la luz operatoria sobre las resinas compuestas: evaluación de su contracción
The impact of operative light on composite resins: evaluation of their shrinkage

El objetivo de este estudio fue analizar el comportamiento, contracción volumétrica, de diferentes resinas compuestas de fotopolimerización, expuestas a variadas condiciones de incidencia lumínica. Se tomaron volúmenes estandarizados de 7 resinas compuestas (microhíbridas y nanohíbridas y nanopart...