Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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The effects of non-thermal plasma and conventional treatments on the bond strength of fiber posts to resin cement

  • do Prado, Maira (Metallurgical and Materials Engineering, Federal University of Rio de Janeiro) ;
  • da Silva, Eduardo Moreira (Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Federal Fluminense University) ;
  • Marques, Juliana das Neves (Metallurgical and Materials Engineering, Federal University of Rio de Janeiro) ;
  • Gonzalez, Caroline Brum (Department of Dental Clinics, Federal University of Rio de Janeiro) ;
  • Simao, Renata Antoun (Metallurgical and Materials Engineering, Federal University of Rio de Janeiro)
  • Received : 2016.09.24
  • Accepted : 2017.02.11
  • Published : 2017.05.31
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Abstract

Objectives: This study compared the effect of hexamethyldisiloxane (HMDSO) and ammonia ($NH_3$) plasmas on the bond strength of resin cement to fiber posts with conventional treatments. Materials and Methods: Sixty-five fiber posts were divided into 5 groups: Control (no surface treatment); $H_2O_2$ (24% hydrogen peroxide for 1 min); Blasting (blasting with aluminum oxide for 30 sec); $NH_3$ ($NH_3$ plasma treatment for 3 min); HMDSO (HMDSO plasma treatment for 15 min). After the treatments, the Ambar adhesive (FGM Dental Products) was applied to the post surface (n = 10). The fiber post was inserted into a silicon matrix that was filled with the conventional resin cement Allcem Core (FGM). Afterwards, the post/cement specimens were cut into discs and subjected to a push-out bond strength (POBS) test. Additionally, 3 posts in each group were evaluated using scanning electron microscopy. The POBS data were analyzed by one-way analysis of variance and the Tukey's honest significant difference post hoc test (${\alpha}=0.05$). Results: The Blasting and $NH_3$ groups showed the highest POBS values. The HMDSO group showed intermediate POBS values, whereas the Control and $H_2O_2$ groups showed the lowest POBS values. Conclusion: Blasting and $NH_3$ plasma treatments were associated with stronger bonding of the conventional resin cement Allcem to fiber posts, in a procedure in which the Ambar adhesive was used.

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References

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