Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
Braz. oral res
;
24(4): 475-481, Oct.-Dec. 2010. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-569229
ABSTRACT
The aim of this study was to observe the influence of two light polymerization units (LED or halogen light) on the degree of conversion (DC) of three dental composites with lighter shades and a different photoinitiator system. The top (T) and bottom (B) surfaces of 60 discs of composite resin (Filtek Supreme, Filtek Z250, Tetric Ceram Bleach) cured either by LED or by halogen lamp (HL) were studied using an FT-Raman spectrometer. The degree of conversion (DC) was evaluated by following the changes in the intensity of the methacrylate C=C stretching mode at 1640 cm-1. The calculated DC ranged from 54.2 percent (B) to 73.4 percent (T) and from 60.2 percent (B) to 76.6 percent (T) for the LED and HL, respectively. LED and halogen devices were able to produce an adequate DC for all the resins tested.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Resinas Compostas
/
Lâmpadas de Polimerização Dentária
/
Fotoiniciadores Dentários
/
Polimerização
Idioma:
Inglês
Revista:
Braz. oral res
Assunto da revista:
Odontologia
Ano de publicação:
2010
Tipo de documento:
Artigo
/
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