Effect of pre- heating on hardness of methacrylate- and silorane- based composites
J. res. dent
;
2(5): 370-375, sep.-oct2014.
Artigo
em Inglês
| LILACS, BBO
| ID: biblio-1363352
ABSTRACT
AIM:
To evaluate the effect of composite pre-heating on the microhardness of different monomer resin-based. MATERIALS ANDMETHOD:
Circular specimens of methacrylate- and silorane-based composite resins pre-heated at 23, 39, and 55Ë C were carried out, and cured using a halogen light-curing unit at 650 mW/cm². After 24 h, the specimens were polished and Knoop hardness number (KHN) was measured using a microhardness tester with 50-g load for 15 s. The data were analyzed with ANOVA and Tukey's tests (α = 0.05).RESULTS:
Top surface presented higher KHN than bottom, methacrylate-based composite showed higher KHN compared to silorane, and pre-heating increased the KHN of the composites tested.CONCLUSION:
Pre-heating can be used to improve the microhardness of methracrylate- and silorane-based composites.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Resinas Compostas
/
Polimerização
Limite:
Humanos
Idioma:
Inglês
Revista:
J. res. dent
Assunto da revista:
Odontologia
/
Sa£de Bucal
Ano de publicação:
2014
Tipo de documento:
Artigo
País de afiliação:
Bélgica
/
Brasil
Instituição/País de afiliação:
Catholic University of Leuven/BE
/
Nove de Julho University/BR
/
University of Campinas/BR
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