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Effect of butylated hydroxytoluene (BHT) concentrations on polymerization shrinkage stress and other physicochemical properties of experimental resin composites.
Pereira, Roberta Pinto; de Oliveira, Dayane; Rocha, Mateus Garcia; Roulet, Jean-François; Geraldeli, Saulo; Sinhoreti, Mário.
Afiliação
  • Pereira RP; Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
  • de Oliveira D; Department of Restorative Dental Science, College of Dentistry, University of Florida, Gainesville, FL, USA.
  • Rocha MG; Department of Restorative Dental Science, College of Dentistry, University of Florida, Gainesville, FL, USA.
  • Roulet JF; Department of Restorative Dental Science, College of Dentistry, University of Florida, Gainesville, FL, USA.
  • Geraldeli S; Division of Biomedical Materials, School of Dental Medicine, East Carolina University, Greenville, NC, USA.
  • Sinhoreti M; Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil. Electronic address: sinhoreti@unicamp.br.
J Mech Behav Biomed Mater ; 157: 106652, 2024 Sep.
Article em En | MEDLINE | ID: mdl-38970944
ABSTRACT
The present study examined different concentrations of the butylated hydroxytoluene (BHT) inhibitor on the kinetics of conversion, polymerization shrinkage stress, and other correlated physicochemical properties of experimental resin composites (ERC). A model composite was formulated with 75 wt% filler containing 0.5 wt% camphorquinone and 1 wt% amine with BHT concentrations of 0.01 wt% (BHT-0.01); 0.1 wt% (BHT-0.1); 0.25 wt% (BHT-0.25); 0.5 wt% (BHT-0.5); 1 wt% (BHT-1), and control (no BHT). They were tested on polymerization shrinkage stress (PSS; n = 5), degree of conversion (DC; n = 3), maximum polymerization rate (RpMAX; n = 5), water sorption (Wsp; n = 0), and solubility (Wsl; n = 10), flexural strength (FS; n = 10), flexural modulus (FM; n = 10), Knoop microhardness (KH; n = 10), and microhardness reduction (HR; n = 10). Data concerning these tests were submitted to one-way ANOVA and Tukey's test (α = 0.05; ß = 0.2). BHT-0.25, BHT-0.5, and BHT-1 showed a gradually significant decrease in PSS (p = 0.037); however, BHT-1 demonstrated a decrease in the physicochemical properties tested. Thus, within the limitations of this study, it was possible to conclude that BHT concentrations between 0.25 and 0.5 wt% are optimal for reducing shrinkage stress without affecting other physicochemical properties of ERCs.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estresse Mecânico / Teste de Materiais / Hidroxitolueno Butilado / Resinas Compostas / Polimerização Idioma: En Revista: J Mech Behav Biomed Mater Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estresse Mecânico / Teste de Materiais / Hidroxitolueno Butilado / Resinas Compostas / Polimerização Idioma: En Revista: J Mech Behav Biomed Mater Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda