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The use of clays for chlorhexidine controlled release as a new perspective for longer durability of dentin adhesion

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An Author Correction to this article was published on 05 March 2020

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Abstract

The adhesive systems have the function to establish the connection between the restorative material and dental tissue, therefore it is of fundamental importance, because failures in the adhesive interface can reduce the life of a dental restoration. This study investigated the possibility of using the adhesive layer as a chlorhexidine modified release system evaluating their impact on the properties of these systems as well as evaluating the impact of these systems on immediate and post-aging dentin adhesion. Were used a matrix with BisGMA, UDMA, HEMA and TEGDMA copolymer and clay particles (Dellite 67G); associated with a chlorhexidine and a camphorquinone photoinitiator system. The properties of these systems were evaluated by the XRD, FTIR spectrophotometer, flexural strength, elasticity modulus, drug release, enzymatic inhibition and dentin adhesion resistance. The presence of the clay can raise the mechanical properties of the adhesive systems engendering a more resistant hybrid layer and led to a more sustained release of chlorhexidine in the systems, allowing a longer effective period of MMP-2 inhibition. The hypothesis that the addition of clays as release modulators could increase the effectiveness of these drugs in inhibiting the dentin’s MPPs and consequently enhancing the adhesive durability was confirmed. These results indicate that the controlled release of chlorhexidine is able to reduce the process of loss of adhesion presenting itself as a promising system to increase the longevity of dental restorations.

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Change history

  • 05 March 2020

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

  • 05 March 2020

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

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Acknowledgements

We would like to thank Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for funding. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.

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Authors and Affiliations

  1. Instituto de Macromoléculas Professora Eloisa Mano da Universidade Federal do Rio de Janeiro UFRJ, Rio de Janeiro, Brazil

    Lívia Rodrigues de Menezes, Emerson Oliveira da Silva & Lizandra Viana Maurat da Rocha

  2. Faculdade de Odontologia de Piracicaba/Universidade Estadual de Campinas UNICAMP, Campinas, Brazil

    Isabel Ferreira Barbosa

  3. Institute of Macromolecular Chemistry AS CR, Prague, Czech Republic

    Marina Rodrigues Tavares

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  1. Lívia Rodrigues de Menezes
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  2. Emerson Oliveira da Silva
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Correspondence to Lívia Rodrigues de Menezes.

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de Menezes, L.R., da Silva, E.O., Maurat da Rocha, L.V. et al. The use of clays for chlorhexidine controlled release as a new perspective for longer durability of dentin adhesion. J Mater Sci: Mater Med 30, 132 (2019). https://doi.org/10.1007/s10856-019-6344-5

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