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

Ozkurt-Kayahan Z., Turgut B., Akin H., Kayahan M. B., Kazazoglu E.

CLINICAL ORAL INVESTIGATIONS, vol.24, no.10, pp.3477-3483, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 10
  • Publication Date: 2020
  • Doi Number: 10.1007/s00784-020-03218-3
  • Journal Name: CLINICAL ORAL INVESTIGATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, EMBASE, MEDLINE
  • Page Numbers: pp.3477-3483
  • Keywords: Finite element analysis, MTA, Pulp perforation, Stress, Thickness, BIOACTIVE ENDODONTIC CEMENTS, COMPRESSIVE STRENGTH, PHYSICAL-PROPERTIES, COMPOSITE RESIN, BIODENTINE, PREMOLARS, FRACTURE
  • Erciyes University Affiliated: Yes

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.