Impact of light-curing time and aging on dentin bond strength of methacrylate- and silorane-based restorative systems
Braz. j. oral sci
; 13(3): 213-218, Jul-Sep/2014. tab
Article
em En
| LILACS
| ID: lil-725348
Biblioteca responsável:
BR218.1
ABSTRACT
AIM:
To evaluate the impact of different light-curing times on dentin microtensile bond strength of two restorative systems after 24 h and 6 months of water storage.METHODS:
Standardized Class II preparations were performed in 56 freshly-extracted human molars (n = 7), restored with methacrylate- or silorane-based restorative systems, and light-cured using a light-emitting diode at 1390 mW/cm2 by the recommended manufacturers' time or double this time. After storage for 24 h at 37 oC, the teeth were sectioned to yield a series of 0.8-mm thick slices. Each slab was trimmed into an hourglass shape of approximately 0.64 mm2 area at the gingival dentin-resin interface. Specimens were tested using universal testing machine at crosshead speed of 0.5 mm/min until failure, after 24 h and 6 months of storage. Data were statistically analyzed by three-way ANOVA and Tukey's test (α = 0.05).RESULTS:
The highest bond strength values were recorded for the groups restored with methacrylate system (p<0.001) as well as for extended light-curing time (p = 0.0034). There was no statistically significant difference between 24 h and 6 months storage on bond strength (p>0.05).CONCLUSIONS:
Bond strength was influenced by the material and light-curing time, but the 6-month storage did not affect the bond strength of restorations...Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Colagem Dentária
/
Resinas Compostas
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Dentina
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Lâmpadas de Polimerização Dentária
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Polimerização
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Resinas de Silorano
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Metacrilatos
Limite:
Female
/
Humans
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Male
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
/
Project document
País de afiliação:
Brasil
País de publicação:
Brasil