Bulk and surface properties related to composite filler size

Authors

  • Kátia Gerhardt Veiga de Almeida University
  • Andrea Soares Quirino da Silva Veiga de Almeida University; Rio de Janeiro Federal University
  • Guilherme Rego Federal Fluminense University
  • Mário Alexandre Coelho Sinhoreti UNICAMP
  • Vinicius Esteves Salgado Pelotas Federal University
  • Luis Felipe J. Schneider Veiga de Almeida University; Federal Fluminense University

DOI:

https://doi.org/10.20396/bjos.v12i4.8640970

Keywords:

Nanocomposites, Resin cements, Surface properties

Abstract

There are few studies that fully characterize the effect of the filler size on the surface, optical and mechanical properties of resin composites. Aim: To determine the influence of the filler size content on surface, optical and mechanical properties before and after accelerated aging. Methods: Seven resin composites were investigated: Filtek Supreme® (3M/ESPE), Estelite Σ Quick® (Tokuyama), Evolu-X® (Dentsply), Esthet-X HD® (Dentsply), Opallis® (FGM), Herculite XRV Ultra® (Kerr) and Filtek Z250® (3M/ESPE). Elastic modulus (EM) and flexural strength (FS) were determined by three-point bending of specimens immersed or not in absolute ethanol for seven days. Roughness (Ra) and gloss (G.U.) analyses were determined before and after ethanol storage for seven days and CIELAB color change (∆E*) was obtained with a spectrophotometer. Results were analyzed by two-way ANOVA (general linear model) for EM and FS, with repeated measures for roughness and gloss, and one-way ANOVA for ∆E*. All comparisons were performed by Tukey’s test (5%). Pearsons’ correlation test was performed to determine the correlation between EM, FS, roughness, gloss, and ∆E* with the mean filler sizes. Results: Mechanical properties decreased for all materials when submitted to immersion in ethanol. Increasing filler size gradually increased EM, FS and roughness values; gloss values decreased and didn’t significantly affects ∆E*. Nanofiller composites presented higher gloss values than the others. Conclusions: It was possible to determine that the average filler size is a good predictor just for FS and gloss retention.

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Author Biographies

Kátia Gerhardt, Veiga de Almeida University

Department of Oral Rehabilitation, Dental Materials Research Lab, Dental School, Veiga de Almeida University, Rio de Janeiro, RJ.

Andrea Soares Quirino da Silva, Veiga de Almeida University; Rio de Janeiro Federal University

Department of Oral Rehabilitation, Dental Materials Research Lab, Dental School, Veiga de Almeida University; Department of Restorative Dentistry, Dental School, Rio de Janeiro Federal University, Rio de Janeiro, RJ.

Guilherme Rego, Federal Fluminense University

Department of Restorative Dentistry, Dental School, Federal Fluminense University, Niterói, RJ.

Mário Alexandre Coelho Sinhoreti, UNICAMP

Area of Dental Materials, Piracicaba Dental School, University of Campinas, Piracicaba, SP.

Vinicius Esteves Salgado, Pelotas Federal University

Area of Dental Materials, Dental School, Pelotas Federal University, Pelotas, RS.

Luis Felipe J. Schneider, Veiga de Almeida University; Federal Fluminense University

Department of Oral Rehabilitation, Dental Materials Research Lab, Dental School, Veiga de Almeida University; Department of Restorative Dentistry, Dental School, Federal Fluminense University, Niterói, RJ.

Published

2015-10-15

How to Cite

1.
Gerhardt K, Silva ASQ da, Rego G, Sinhoreti MAC, Salgado VE, Schneider LFJ. Bulk and surface properties related to composite filler size. Braz. J. Oral Sci. [Internet]. 2015Oct.15 [cited 2021Oct.24];12(4):323-9. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640970

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