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Influence of different shades and LED irradiance on the degree of conversion of composite resins
Gaglianone, Lívia Aguilera; Lima, Adriano Fonseca; Araújo, Larissa Sgarbosa Napoleão de; Cavalcanti, Andrea Nóbrega; Marchi, Giselle Maria.
  • Gaglianone, Lívia Aguilera; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Operative Dentistry Area. Piracicaba. BR
  • Lima, Adriano Fonseca; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Operative Dentistry Area. Piracicaba. BR
  • Araújo, Larissa Sgarbosa Napoleão de; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Operative Dentistry Area. Piracicaba. BR
  • Cavalcanti, Andrea Nóbrega; School of Medicine and Public Health of Bahia. School of Dentistry. Department of Oral Rehabilitation. Salvador. BR
  • Marchi, Giselle Maria; State University of Campinas. Piracicaba Dental School. Department of Restorative Dentistry, Operative Dentistry Area. Piracicaba. BR
Braz. oral res ; 26(2): 165-169, Mar.-Apr. 2012. ilus, tab
Artigo em Inglês | LILACS | ID: lil-622915
ABSTRACT
The aim of this study was to evaluate the degree of conversion (DC) of two composite resins with different shades that were light cured by light-emitting diodes (LEDs) of different irradiances. Specimens (5 mm ' 2 mm) were prepared with a nanofilled (Filtek Supreme - A2E, A2D, and WE) or microhybrid resin (Opallis - A2E, A2D, and EBleach Low) and were randomly divided into 12 groups (n = 5 each) according to the composite resin and light-curing unit (Elipar FreeLight 2, 1250 mW/cm²; Ultralume 5, 850 mW/cm²). After 24 h, the DC was measured on two surfaces (top and bottom) with Fourier Transform infrared spectroscopy (FTIR). Data were statistically analyzed with two-way ANOVA and Tukey test (a = 0.05). Statistical differences among the surfaces were observed in all experimental conditions, with higher values on the top surface. The microhybrid resin presented the highest DCs for shades A2E and A2D on the top surface. The LED with higher irradiance promoted better DCs. Taken together, the data indicate that the shade of a composite resin and the irradiance of the light source affect the monomeric conversion of the restorative material.
Assuntos


Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Resinas Compostas / Lâmpadas de Polimerização Dentária Tipo de estudo: Ensaio Clínico Controlado / Estudos de avaliação Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2012 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: School of Medicine and Public Health of Bahia/BR / State University of Campinas/BR

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Texto completo: DisponíveL Índice: LILACS (Américas) Assunto principal: Resinas Compostas / Lâmpadas de Polimerização Dentária Tipo de estudo: Ensaio Clínico Controlado / Estudos de avaliação Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2012 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: School of Medicine and Public Health of Bahia/BR / State University of Campinas/BR