Influence of different light curing units on the bond strength of indirect resin composite restorations
Braz. oral res
;
22(2): 164-169, 2008. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-485957
ABSTRACT
The aim of this study was to evaluate the influence of different light sources on the bond strength of indirect resin composite restorations cemented with a dual-cure resin cement. The superficial dentin of human third molars was exposed and acid-etched and an adhesive system was applied (Single Bond 2). Four-mm-thick indirect resin composite restorations (Gradia) were fabricated and cemented using a dual-cure resin cement (Rely X). Four light sources were used to polymerize the cement QTH - Optilux 401; LED1 - L.E.Demetron 1; LED2 - Optilight CL; and LED3 - Ultralume 5. The teeth were stored for 24 h and then sectioned, yielding stick-shaped specimens for each group with a bonded area of 1.0 mm². The specimens were then tested in a universal testing machine, at a crosshead speed of 1 mm/min. Data were analyzed using ANOVA. Bond strength mean values were QTH 22.5 (± 8.4); LED1 22.7 (± 9.4); LED2 21.4 (± 10.2); and LED3 27.3 (± 13.8). No statistically significant difference was observed among the experimental groups. The bond strength values when the cement was polymerized using different LED lights were equivalent to the values when the QTH light was used. It can be concluded that the variety of light sources used in the present study did not influence the bond strength of indirect resin composite restorations cemented with a dual-cure resin cement.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Cimentação
/
Resinas Compostas
/
Cimentos de Resina
/
Restauração Dentária Permanente
/
Cura Luminosa de Adesivos Dentários
/
Lâmpadas de Polimerização Dentária
Limite:
Humanos
Idioma:
Inglês
Revista:
Braz. oral res
Assunto da revista:
Odontologia
Ano de publicação:
2008
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Oeste do Paraná University/BR
/
University of Ponta Grossa/BR
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