Influence of cement thickness on resin-zirconia microtensile bond strength
The Journal of Advanced Prosthodontics
;
: 119-125, 2011.
Artigo
em Inglês
| WPRIM
| ID: wpr-172527
ABSTRACT
PURPOSE:
The aim of this study was to evaluate the influence of resin cement thickness on the microtensile bond strength between zirconium-oxide ceramic and resin cement. MATERIALS ANDMETHODS:
Thirty-two freshly extracted molars were transversely sectioned at the deep dentin level and bonded to air-abraded zirconium oxide ceramic disks. The specimens were divided into 8 groups based on the experimental conditions (cement type Rely X UniCem or Panavia F 2.0, cement thickness 40 or 160 microm, storage thermocycled or not). They were cut into microbeams and stored in 37degrees C distilled water for 24 h. Microbeams of non-thermocycled specimens were submitted to a microtensile test, whereas those of thermocycled groups were thermally cycled for 18,000 times immediately before the microtensile test. Three-way ANOVA and Sheffe's post hoc tests were used for statistical analysis (alpha=95%).RESULTS:
All failures occurred at the resin-zirconia interface. Thermocycled groups showed lower microtensile bond strength than non-thermocycled groups (P.05). The number of adhesive failures increased after thermocycling in all experimental conditions. No cohesive failure was observed in any experimental group.CONCLUSION:
When resin cements of adhesive monomers are applied over air-abraded zirconia restorations, the degree of fit does not influence the resin-zirconia microtensile bond strength.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Zircônio
/
Água
/
Cerâmica
/
Adesivos
/
Cimentos de Resina
/
Dentina
/
Dente Molar
Idioma:
Inglês
Revista:
The Journal of Advanced Prosthodontics
Ano de publicação:
2011
Tipo de documento:
Artigo
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