Effect of light sources and curing mode techniques on sorption, solubility and biaxial flexural strength of a composite resin

Carvalho, Andreia Assis; Moreira, Francine do Couto Lima; Fonseca, Rodrigo Borges; Soares, Carlos José; Franco, Eduardo Batista; Souza, João Batista de; Lopes, Lawrence Gonzaga

doi:10.1590/s1678-77572012000200021

Cited by 18 publications

(25 citation statements)

References 26 publications

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“…8,9 Composite resin polymers can absorb water and chemicals from the oral environment through "sorbtion, " a diffusion-controlled process that occurs largely within the resin matrix. 10,11 Sorbtion can lead to softening of the matrix, release of unreacted monomers, and degradation of by-products as well as leaching of filler ions. 12 Dissolution and leaching of unreacted monomers and fillers result in weight loss that can be measured as solubility or leaching.…”

Section: Introductionmentioning

confidence: 99%

Water Sorption, Solubility, and Color Stability of Giomer Restoratives

Gönülol

Özer

Tunç

2014

J Esthet Restor Dent

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Section: Introductionmentioning

confidence: 99%

Water Sorption, Solubility, and Color Stability of Giomer Restoratives

Gönülol

Özer

Tunç

2014

J Esthet Restor Dent

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“…Suitable polymerization is very important to the longevity of composite resin restorations, because these materials require sufficient light intensity and wavelength to activate the photoinitiator that will react with a reducing agent for the formation of free radicals, and to begin the polymerization process 1 . Within the same energy, the increase in power density makes the degree of photoactivation diminish linearly, causing an increase in strength and flexural modulus 14 .…”

Section: Discussionmentioning

confidence: 99%

“…Nowadays there is increasing demand for esthetic restorations, and light polymerized composite resins are the materials most used in these procedures [1][2][3] . Resin composites are usually composed of an organic matrix and filler particles 3 .…”

Section: Introductionmentioning

confidence: 99%

The influence of three photoactivation techniques on the sorption and solubility of different composite resins

Matumoto

Mendonça

Busato

et al. 2018

Rev. odontol. UNESP

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Introduction There is a growing demand for aesthetic restorations and the polymerized composite resins are the most used material in these procedures. In order to achieve greater resistance to solubilization proper polymerization is required. Objective Evaluate the influence of three photoactivation techniques, on sorption and solubility of three composite resins. Materials and methods 90 test samples measuring 8 mm diameter and 1 mm thick were made and divided into 9 groups (n=10) of resins -Filtek Z350 XT, Tetric N-Ceram and IPS Empress Direct, each of them was polymerized with LED Bluephase, using the techniques: Conventional, Soft-Start (SS) and Pulse Delay (PD). Afterwards they were placed in desiccator with silica gel at 98.6 F and weighed daily until obtaining a constant mass (m1). Then they were immersed in deionized water for seven days and weighed again (m2). The test sample reconditioning was performed using the m1 procedure, until a constant mass (m3 ) was obtained. The sorption and solubility values were calculated and subjected to ANOVA test (two-way), followed by Tukey post hoc, p<0.05. Result There were no statistically significant differences in sorption and solubility among the studied resins when photoactivation techniques were compared. For solubility analysis, statistically significant differences were observed among the materials. The results for composite resin Filtek Z350 XT presented higher statistical hybridization values than those of the other evaluated resins. Conclusion The different forms of photoactivation had no influence on the sorption and solubility of the tested composite resins.

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“…Já, a técnica de pulso atrasado, consiste na fotoativação inicial com baixa intensidade, também por um período de tempo curto, seguido por um período de espera, e finalização da fotoativação com alta intensidade de luz. O intervalo entre os dois pulsos, aumenta a fase pré-gel da resina composta e melhora a sua fluidez, aliviando o stress gerado pela contração do compósito [13] . Para a técnica soft-start o tempo inicial utilizado foi de 650mW/cm 2 , por ser a densidade de potência indicada pelo fabricante Os resultados do presente estudo mostraram que a superfície de base, quando comparado quanto aos métodos de polimerização, não mostraram diferenças estatísticas significantes para todos os grupos avaliados.…”

Section: Discussionunclassified

Influência de três modos de fotopolimerização sobre a microdureza de três resinas compostas

et al. 2016

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ResumoA adequada fotopolimerização das resinas compostas é fundamental para obtenção de uma boa dureza capaz de resistir aos esforços mastigatórios. Assim, o objetivo deste estudo foi avaliar a influência das técnicas de fotopolimerização -Convencional (CONV), Soft-start (SS) e Pulso atrasado (PA) na microdureza Knoop de três resinas compostas. Para a confecção dos corpos-de-prova foram utilizadas as resinas compostas Filtek Z350 (3M ESPE), Empress Direct (IvoclarVivadent) e P90 (3M ESPE). Foram obtidos nove grupos experimentais em função da técnica de polimerização e resina composta. Vinte e quatro horas após a fotopolimerização foi realizado o teste de microdureza Knoop nas superfícies de base e topo de cada corpo-de-prova. Assim, os valores obtidos foram submetidos ao teste de Kruskall Wallis, seguido do teste de Dunn, p < 0,05. A eficácia da polimerização na superfície de topo das resinas compostas testadas não foi afetada pelos diferentes modos de polimerização. A resina composta Empress Direct apresentou os mais baixos valores de dureza para todos os modos de polimerização quando comparada às demais resinas compostas avaliadas. Palavras-chave: fotopolimerização, dureza knoop, resina composta. AbstractProper curing of composites is critical to obtaining good toughness able to withstand masticatory forces. The objective of this study was to evaluate the influence of curing techniques -conventional (CONV), Soft -start (SS) and Pulse delayed (PA) in microhardness of three composites. To make up the body-of -evidence were used composites Filtek Z350 (3M ESPE), Empress Direct (IvoclarVivadent) and P90 (3M ESPE). Nine experimental groups were obtained according to the polymerization technique and composite resin. Twenty -four hours after curing was performed Knoop microhardness test surfaces of base and top of each body -of -evidence. Thus, the values obtained were subjected to the Kruskal Wallis test followed by Dunn's test, p < 0.05. The effectiveness of the polymerization on the top surface of the composites tested was not affected by different modes of polymerization. The Empress Direct composite resin showed the lowest hardness values for all modes of polymerization compared to other composites evaluated.

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Effect of light sources and curing mode techniques on sorption, solubility and biaxial flexural strength of a composite resin

Cited by 18 publications

References 26 publications

Water Sorption, Solubility, and Color Stability of Giomer Restoratives

Water Sorption, Solubility, and Color Stability of Giomer Restoratives

The influence of three photoactivation techniques on the sorption and solubility of different composite resins

Influência de três modos de fotopolimerização sobre a microdureza de três resinas compostas

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