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Radiopaque dental adhesive with addition of niobium pentoxide nanoparticles

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Abstract

Radiopacity is an important property of dental adhesives, because it allows the adhesive resin to be in contrast with the tooth structure and other restorative materials. This study aimed to develop a radiopaque experimental adhesive resin through the addition of niobium pentoxide (Nb2O5) particles. The effects of adding different concentrations of Nb2O5 nanoparticles synthesized by microwave-assisted hydrothermal synthesis (MHS) were compared to the commercial Nb2O5 microparticles. The experimental adhesive resin was formulated by mixing bisphenol A glycidyl methacrylate (Bis-GMA), 2-hydroxyethyl methacrylate (HEMA), camphorquinone (CQ) and ethyl 4-(dimethylamino)benzoate (EDAB). Experimental adhesive resins were evaluated by the radiopacity, degree of conversion, Knoop microhardness, translucency parameter, depth of cure, viscosity, and sedimentation rate. Synthesized Nb2O5 showed hexagonal structure and nanoneedles aggregates in form of nanoflowers. The incorporation of Nb2O5 nanoparticles into the dental adhesive resin showed high dispersion stability and improved the radiopaque properties.

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Acknowledgements

The authors are grateful to the support of CAPES, CNPq, FAPERGS, CEME-SUL, ClinDoc, and Companhia Brasileira de Metalurgia e Mineração (CBMM) by the ammonium niobium oxalate and Nb2O5 microparticles donations.

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Authors and Affiliations

  1. Graduate Program in Materials Science and Engineering, Federal University of Pelotas, Pelotas, RS, 96010-610, Brazil

    Natália H. Marins, Ricardo M. Silva, Neftalí L. V. Carreño & Fabrício A. Ogliari

  2. Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, 96015-560, Brazil

    Carine T. W. Meereis & Fabrício A. Ogliari

  3. School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, RS, 96201-900, Brazil

    Caroline P. Ruas

  4. Graduate Program in Mining, Metallurgy and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91501-970, Brazil

    Antonio S. Takimi

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  1. Natália H. Marins
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  2. Carine T. W. Meereis
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  3. Ricardo M. Silva
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Correspondence to Fabrício A. Ogliari.

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Marins, N.H., Meereis, C.T.W., Silva, R.M. et al. Radiopaque dental adhesive with addition of niobium pentoxide nanoparticles. Polym. Bull. 75, 2301–2314 (2018). https://doi.org/10.1007/s00289-017-2150-8

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  • DOI: https://doi.org/10.1007/s00289-017-2150-8

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