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Mineral density changes in bovine carious dentin after treatment with bioactive dental cements: a comparative micro-CT study

  • Aline Borburema Neves
  • Tamiris Gomes Bergstrom
  • Andréa Fonseca-Gonçalves
  • Thais Maria Pires dos Santos
  • Ricardo Tadeu Lopes
  • Aline de Almeida Neves
Original Article
  • 39 Downloads

Abstract

Objectives

To evaluate the potential of conventional glass ionomer cement (GIC), Biodentine™, MTA, and Portland cement to induce mineral density changes in carious dentin compared to zinc oxide eugenol control cement (ZOE).

Materials and methods

Fifty blocks of bovine root dentin were prepared and a biofilm model using ATCC strains of S.mutans, S.sobrinus, and L.casei was used to promote artificial dentin lesions. After demineralization, the blocks were randomly divided into the five cement groups. Half of the surface of each specimen received the tested material and the other half was covered with wax (control). Samples were stored in phosphate buffered saline solution for 30 days and after that were scanned in a micro-CT with standardized parameters. Dentin mineral density changes were calculated using differences in plot profiles of the exposed and control carious dentin. Friedman’s test, followed by Wilcoxon signed-rank test was used with 5% significance.

Results

Mean ΔZ values for the cements were 48.63 ± 19.09 for the control (ZOE), 63.31 ± 32.59 for Biodentine™, 114.63 ± 72.92 for GIC, 109.56 ± 66.28 for MTA, and 106.88 ± 66.02 for Portland cement. All cements showed a statistically significant increase in ΔZ values compared to the control, but Biodentine™ values were statistically significantly lower compared to GIC and the other calcium silicate cements.

Conclusions

Tested materials present potential to induce mineral density changes in carious bovine dentin. MTA, Portland, and GIC showed higher bioactivity potential than Biodentine™.

Clinical relevance

Based on minimally invasive concept, materials with remineralization potential can be used to preserve diseased but still repairable dental tissue.

Keywords

Dentin caries Bioactive cements Micro-CT MTA Glass ionomer 

Notes

Acknowledgments

The authors are grateful to the Department of Pediatric Dentistry and Orthodontics in Federal University of Rio de Janeiro (UFRJ) and Laboratory for Nuclear Instrumentation (UFRJ).

Funding

The work was supported by the Department of Pediatric Dentistry and Orthodontics and Laboratory for Nuclear Instrumentation of Federal University of Rio de Janeiro. This study was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Pesquisa Científica (CNPq), and Fundação Carlos Chagas de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed consent

For this type of study, formal consent is not required.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Aline Borburema Neves
    • 1
  • Tamiris Gomes Bergstrom
    • 1
  • Andréa Fonseca-Gonçalves
    • 1
  • Thais Maria Pires dos Santos
    • 2
  • Ricardo Tadeu Lopes
    • 2
  • Aline de Almeida Neves
    • 1
    • 3
  1. 1.Department of Pediatric Dentistry and OrthodonticsFederal University of Rio de JaneiroRio de JaneiroBrazil
  2. 2.Laboratory for Nuclear InstrumentationFederal University of Rio de JaneiroRio de JaneiroBrazil
  3. 3.Departamento de Odontopediatria e OrtodontiaUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil

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