Influence of light guide tip used in the photo-activation on degree of conversion and hardness of one nanofilled dental composite

Galvão, Marília Regalado; Costa, Simone Xavier Silva; Victorino, Keli Regina; Ribeiro, Alexandre; Menezes, Fernando Carlos Hueb de; Rastelli, A. N. S.; Bagnato, Vanderlei Salvador; Andrade, Marcelo Ferrarezi de

doi:10.1134/s1054660x10190059

Cited by 14 publications

(17 citation statements)

References 41 publications

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“…A densidade de potência emitida pelas fontes de luz deve ser no mínimo de 300 mW/cm² a 400 mW/cm² para polimerizar adequadamente um incremento de 1,5 mm a 2 mm de resina composta 7,11 . Se a restauração de resina não recebe a densidade de potência adequada, pode ocorrer acúmulo de monômero residual, levando a um baixo GC, aumento da citotoxicidade, redução da dureza, diminuição no módulo de elasticidade, aumento do desgaste e ruptura das margens da restauração 12 .…”

Section: Discussionunclassified

Avaliação do grau de conversão de resinas compostas fotoativadas em diferentes tempos e potências

Lima¹,

Souza²,

Amorim³

et al. 2016

Rev. da Fac. de Odontologia, UPF

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Introdução: uma polimerização adequada é crucial para a obtenção das propriedades físicas ideais e o desempenho clínico das resinas compostas. Objetivo: avaliar o grau de conversão (GC) e dureza de resinas IntroduçãoDesenvolvidas por Bowen durante a década de 1960, as resinas compostas à base de BisGMA passaram por transformações com o intuito de melhorar suas propriedades mecânicas e estéticas 1 . Concomitantemente à evolução desses materiais, os pacientes buscam cada vez mais a excelência estética ao sorrir, o que leva ao desenvolvimento de resinas que, além de devolver a forma e função do dente, favoreçam a harmonia do sorriso de maneira natural. Sendo assim, por proporcionar ao profissional a capacidade de restabelecer a estética do sorriso, confeccionar restaurações em dentes posteriores, além do seu baixo custo, quando comparadas

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Section: Discussionunclassified

Avaliação do grau de conversão de resinas compostas fotoativadas em diferentes tempos e potências

Lima¹,

Souza²,

Amorim³

et al. 2016

Rev. da Fac. de Odontologia, UPF

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“…From 15 articles reviewed, 14 evaluated the Degree of Conversion (DC) of resin composite monomers using an Infrared technique [2][3][4][5]7,13,14,[18][19][20][21][22]. During the IR absorption (or reflection) experiments, the technique probes the monomer characteristics by measuring the absorbed radiation in the infrared range.…”

Section: Discussionmentioning

confidence: 99%

“…The total replacement of TEGDMA by BisEMA decreases the DC in the Bis-GMA based resin matrix [25]. Some articles that used the DC analysis did not specify the monomer system in the methodology [1,14,15,20].…”

Section: Discussionmentioning

confidence: 99%

“…Some studies specified what type of light cure was used, if halogen or LED, and their wavelengths and intensities [1,4,5,13,15,18,25]. Other studies only cited the type of light and the time of irradiation [2,3,7,13,14,20,22,26] . The specimens greatly varied among the studies reviewed.…”

Section: Discussionmentioning

confidence: 99%

“…The specimens greatly varied among the studies reviewed. Some studies did films [3,7,22]; while others studies did circular specimens [7,8,10,12,16,24,20] and some studies powdered the polymers [2,22,25]. The description of procedures included citing the dimensions of a mold used as a standard for specimens' fabrication, until the weight of monomers and polymers used are obtained.…”

Section: Discussionmentioning

confidence: 99%

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A Critical Review on the Conversion Degree of Resin Monomers by Direct Analyses

Borges

Chase

Guggiari

et al. 2013

BDS

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Objectives: The aim of this study was to carry out a review on the methods of direct detection of composite resins´ degree of conversion.Data/sources: The authors searched the Cochrane Library, Embase, PubMed, and the Web of Science (ISI) for papers dated from January 1991 to November 2011. The search was complemented by manual searches of the reference lists from each identified relevant paper. The main search terms were: “degree of conversion”, “monomers”, “polymers”, “composite”, “pre-gel”, “post-gel”, “residual monomers” and “double bond”.Study selection: The inclusion criteria were studies that evaluated consolidated methods in the literature to directly evaluate the degree of conversion. Excluded studies were those considered to be unrelated to the question addressed, such as mechanical and physical properties and also monomers from adhesive systems and compomers. The selected papers were assigned to a score (A, B or C), according to the predetermined criteria. A total of 45 papers were selected and 15 papers were included in the critical appraisal. Two articles were labeled as grade A, nine articles were labeled as grade B, and four articles were labeled as grade C. Conclusions: According to the definitions of evidence levels, the current article study showed a strong evidence of review. Clinical significance: The monomer´s degree of conversion predicts the quality of polymers.

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Influence of Bulk Thickness, Curing Time, and Curing Unit Type on the Microhardness of Different-Viscosity Bulk-Fill Composites

2018

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Influence of light guide tip used in the photo-activation on degree of conversion and hardness of one nanofilled dental composite

Cited by 14 publications

References 41 publications

Avaliação do grau de conversão de resinas compostas fotoativadas em diferentes tempos e potências

Avaliação do grau de conversão de resinas compostas fotoativadas em diferentes tempos e potências

A Critical Review on the Conversion Degree of Resin Monomers by Direct Analyses

Influence of Bulk Thickness, Curing Time, and Curing Unit Type on the Microhardness of Different-Viscosity Bulk-Fill Composites

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