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Impact of light-curing time and aging on dentin bond strength of methacrylate- and siloranebased restorative systems
Remote (Português (Brasil))

Keywords

Dental bonding
Composite resins
Methacrylates
Silorane resins
Polymerization

How to Cite

1.
Catelan A, Soares GP, Bedran-Russo AK, Lima DANL, Marchi GM, Aguiar FHB. Impact of light-curing time and aging on dentin bond strength of methacrylate- and siloranebased restorative systems. Braz. J. Oral Sci. [Internet]. 2010 Dec. 30 [cited 2024 May 19];13(3):213-8. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640890

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 o C, 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 lightcuring time, but the 6-month storage did not affect the bond strength of restorations.
Remote (Português (Brasil))
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This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright (c) 2015 Anderson Catelan, Giulliana Panfiglio Soares, Ana Karina Bedran-Russo, Débora Alves Nunes Leite Lima, Giselle Maria Marchi, Flávio Henrique Baggio Aguiar

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