Effect of Restorative Material on Mechanical Response of Provisional Endocrowns: A 3D-FEA Study

The goal of this study was to evaluate the stress distribution in an endocrown restoration according to different provisional restorative materials. An endodontically treated maxillary molar model was selected for conducting the finite element analysis (FEA), with a determined amount of dental remna...

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Bibliographic Details
Published in:Materials 2021-01, Vol.14 (3), p.649
Main Authors: Tribst, João Paulo Mendes, Borges, Alexandre Luiz Souto, Silva-Concílio, Laís Regiane, Bottino, Marco Antonio, Özcan, Mutlu
Format: Article
Language:English
Subjects:
Acrylic resins
Adhesives
Axial loads
Biomechanics
Bonding
Cement
Colorimetry
Composite materials
Dental materials
Enamel
Exports
Failure
Finite element method
Mechanical analysis
Mechanical properties
Modulus of elasticity
Resins
Shear stress
Software
Stress concentration
Stress distribution
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Summary:The goal of this study was to evaluate the stress distribution in an endocrown restoration according to different provisional restorative materials. An endodontically treated maxillary molar model was selected for conducting the finite element analysis (FEA), with a determined amount of dental remnant of 1.5 mm. The model was imported to the analysis software (ANSYS 19.2, ANSYS Inc., Houston, TX, USA) in STEP format. All contacts were considered perfectly bonded. The mechanical properties of each structure were considered isotropic, linear, elastic, and homogeneous. Three different provisional restorative materials were simulated (acrylic resin, bis-acrylic resin, and resin composite). An axial load (300 N) was applied at the occlusal surface in the center of the restoration. Results were determined by colorimetric stress maps of maximum principal stress, maximum shear stress, and total deformation. The different materials influenced the stress distribution for all structures; the higher the material's elastic modulus, the lower the stress magnitude on the cement layer. In the present study, all provisional restorative materials showed similar stress patterns in the endocrown and on the cement layer however, with different magnitude. Based on this study limitation, the use of resin composite to manufacture provisional endocrowns is suggested as a promising material to reduce the stresses in the cement layer and in the dental tissue surfaces.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14030649