Influence of primer and adhesive mixture on the real-time polymerization and mechanical properties of experimental dental adhesives / Influência da mistura de primers e adesivos na polimerização em tempo real e nas propriedades mecânicas de adesivos dentais experimentais

Authors

  • Maria Malerba Colombi Humel Brazilian Journals Publicações de Periódicos, São José dos Pinhais, Paraná
  • Lucia Trazzi Prieto
  • Josué Junior Araujo Pierote
  • Cintia Tereza Pimenta de Araujo
  • João Victor Frazão Câmara
  • Isabel Ferreira Barbosa
  • Guereth Alexsanderson Oliveira Carvalho
  • Luis Alexandre Maffei Sartini Paulillo

DOI:

https://doi.org/10.34117/bjdv6n8-423

Keywords:

Flexural strength, elastic modulus, degree of conversion, adhesive layer, hybrid layer.

Abstract

Objective: To evaluate the influence of primer concentration on the physical and chemical properties of model adhesive systems. Materials and methods: Two model adhesives were tested: M1 (40% BisGMA and 60% HEMA) and M2 (40% BisGMA, 40% HEMA and 20% TEGDMA). The mixture of adhesives with four different concentrations of the primer agent (0, 5, 10 and 15%). The properties evaluated were flexural strength (FS), elastic modulus (E), degree of conversion (DC), the kinetics of conversion (K) and the rate of polymerisation (RP). To evaluate the mechanical properties, were prepared specimens using silicone bar moulds (7 mmX2 mmX1 mm), and tested them by the three-point bending test at a crosshead speed of 0.5 mm/min. DC and the kinetics of cure were measured by Fourier Transform infrared spectroscopy (FTIR). Results: The FS and E of all adhesives tested were not affected by different primer concentrations. All adhesives had decreased DC as the primer concentration increased. In the real-time conversion, the model adhesives presented decreased RP according to increases in primer concentration. Conclusions: Mechanical properties of non-solvated adhesives were not affected by the primer concentrations tested and the DC and RP were influenced by concentrations of the agents.

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Published

2020-08-20

How to Cite

Humel, M. M. C., Prieto, L. T., Pierote, J. J. A., Araujo, C. T. P. de, Câmara, J. V. F., Barbosa, I. F., Carvalho, G. A. O., & Paulillo, L. A. M. S. (2020). Influence of primer and adhesive mixture on the real-time polymerization and mechanical properties of experimental dental adhesives / Influência da mistura de primers e adesivos na polimerização em tempo real e nas propriedades mecânicas de adesivos dentais experimentais. Brazilian Journal of Development, 6(8), 60013–60023. https://doi.org/10.34117/bjdv6n8-423

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Original Papers