Effect of Different Photoiniciers of Experimental Adhesive Systems on Adhesive Interface Union Resistance

  • Tiago Norões Gomes Master's Degree in Restorative Dentistry, Department of Dental Prosthetics, Faculdade de Odontologia São Leopoldo Mandic SLMANDIC, Campinas – SP, Brazil.
  • Jefferson David Melo de Matos Post Graduate Student - Masters Degree Program, Department of Prosthodontics, Universidade Estadual Paulista Júlio de Mesquita Filho UNESP, São José dos Campos - SP, Brazil.
  • John Eversong Lucena de Vasconcelos Professor of Oral Implantology, Department of Dentistry, Centro Caririense de Pós-Graduação CECAP, Juazeiro do Norte – CE, Brazil.
  • Karina Andrea Novaes Olivieri Professor of Dental Prosthetics, Department of Dentistry, Faculdade de Odontologia São Leopoldo Mandic SLMANDIC, Campinas – SP, Brazil.
  • William Cunha Brandt Professor of Dental Prosthetics, Department of Dentistry, Faculdade de Odontologia São Leopoldo Mandic SLMANDIC, Campinas – SP, Brazil.
  • Milton Edson Miranda Professor of Dental Prosthetics, Department of Dentistry, Faculdade de Odontologia São Leopoldo Mandic SLMANDIC, Campinas – SP, Brazil.

Abstract

Aim: The objective of this study was to investigate the performance of experimental resinous adhesives containing different combinations of photoinitiators systems through the bending test.


Material and Methods: Resinous adhesive formulations were prepared with monomer mixtures consisting of 50% by mass of bisphenol dimethacrylate glycidyl (BisGMA) and 50% by mass of triethyleneglycol dimethacrylate (TEGDMA). The photoinitiators were used, camphorquinone (CQ) and bis-alkyl phosphinic oxide (BAPO). The co-initiators were diphenyliodonium hexafluorophosphate (DFI) and the amine (dimethylamino methylmethacrylate - DMAEMA) in the 1:1 proportion by mass. The photopolymerizable initiator systems were dissolved in the organic matrix at 0.5% by mass concentrations, creating eight groups (G1- CQ, G2- CQ/amine, G3- CQ/DFI, G4- CQ/amine/DFI, G5- BAPO, G6- BAPO/amine, G7- BAPO/DFI, G8- BAPO/amine/DFI). Samples with 7.0 mm in length, 2.0 mm wide and 1.0 mm height were prepared (n=12). The curing light used was VALO – Ultradent and the curing time was 20 s. The samples were subjected to evaluation of bending test at three points at a speed of 1 mm/min to evaluate the flexural resistance (FR).


Results: The results were submitted to analysis of variance with one criterion (p < 0,001) and multiple comparisons were performed using Tukey test. Systems with the photoinitiator BAPO showed higher or equivalent bending values that demonstrated by the conventional system containing CQ/amine. Systems with the DFI had higher flexural values in relation to those demonstrated by systems without the DFI to CQ.


Conclusion: The use of systems with alternative photoinitiators and co-initiators allows to obtain superior properties to the conventional system, making these promising systems to act both in isolation as associated with conventional systems.

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Published
2018-05-12
How to Cite
GOMES, Tiago Norões et al. Effect of Different Photoiniciers of Experimental Adhesive Systems on Adhesive Interface Union Resistance. International Archives of Medicine, [S.l.], v. 11, may 2018. ISSN 1755-7682. Available at: <http://imedicalsociety.org/ojs/index.php/iam/article/view/2813>. Date accessed: 18 july 2018. doi: https://doi.org/10.3823/2567.
Section
Dental Medicine