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A 3D finite element analysis of stress distribution on different thicknesses of mineral trioxide aggregate applied on various sizes of pulp perforation

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Abstract

Objectives

The aim of this study was to evaluate the stress distribution on different thicknesses of mineral trioxide aggregate (MTA) placed on various widths of pulp perforations during the condensation of the composite resin material.

Materials and methods

The mandibular molar tooth was modeled by COSMOSWorks program (SolidWorks, Waltham, MA). Three finite elemental analysis models representing 3 different dimensions of pulp perforations, 1, 2, and 3 mm in diameter, were created. The perforation area was assumed as filled with MTA with different thicknesses, 1, 2, and 3 mm for each pulp perforation width, creating a total of 9 different models. Then, a composite resin material was layered on MTA for each model. A 66.7 N load was applied and an engineering simulation program (ANSYS, Canonsburg, US) was used for the analysis. Results were presented considering von Mises stress criteria.

Results

As MTA thickness increased, the stress values recorded within the area between pulp and MTA decreased. Strain was decreased when the thickness of MTA increased.

Conclusions

Stresses at MTA-pulp interface and strain on MTA decreased with the increase in MTA thickness.

Clinical relevance

In clinical practice, when MTA is required for pulp capping, using a thick layer of the material seems to be a better option in order to reduce the stress under forces of hand condensation of overlying restorative materials.

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Acknowledgments

This study was presented in the 11th World Endodontic Congress organized by IFEA on 4–7 October 2018, Seoul, Korea, and chosen for the best presentation award.

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Authors and Affiliations

  1. Department of Prosthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey

    Zeynep Ozkurt-Kayahan & E. Kazazoglu

  2. Department of Mechanical Engineering, Faculty of Natural Sciences and Engineering, Gaziosmanpasa University, Tokat, Turkey

    B. Turgut

  3. Department of Prosthodontics, Faculty of Dentistry, Sakarya University, Sakarya, Turkey

    H. Akin

  4. Department of Endodontics, Faculty of Dentistry, Okan University, Istanbul, Turkey

    M.B. Kayahan

Authors
  1. Zeynep Ozkurt-Kayahan
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  2. B. Turgut
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  3. H. Akin
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  4. M.B. Kayahan
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  5. E. Kazazoglu
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Correspondence to Zeynep Ozkurt-Kayahan.

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Ozkurt-Kayahan, Z., Turgut, B., Akin, H. et al. A 3D finite element analysis of stress distribution on different thicknesses of mineral trioxide aggregate applied on various sizes of pulp perforation. Clin Oral Invest 24, 3477–3483 (2020). https://doi.org/10.1007/s00784-020-03218-3

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  • DOI: https://doi.org/10.1007/s00784-020-03218-3

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