Effect of Fiber Posts on Stress Distribution of Endodontically Treated Upper Premolars: Finite Element Analysis

By means of a finite element method (FEM), the present study evaluated the effect of fiber post (FP) placement on the stress distribution occurring in endodontically treated upper first premolars (UFPs) with mesial–occlusal–distal (MOD) nanohybrid composite restorations under subcritical static load...

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Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-08, Vol.10 (9), p.1708
Main Authors: Zarow, Maciej, Vadini, Mirco, Chojnacka-Brozek, Agnieszka, Szczeklik, Katarzyna, Milewski, Grzegorz, Biferi, Virginia, D’Arcangelo, Camillo, De Angelis, Francesco
Format: Article
Language:English
Subjects:
Adhesives
Composite materials
Computer simulation
Crack propagation
Dental caries
Dentin
Endodontics
fiber post
Finite element analysis
Finite element method
Load distribution
Mathematical models
maxillary first premolar
Mechanical properties
MOD nanocomposite restoration
Nanocomposites
Premolars
Resins
Static loads
Stress concentration
Stress distribution
Teeth
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Summary:By means of a finite element method (FEM), the present study evaluated the effect of fiber post (FP) placement on the stress distribution occurring in endodontically treated upper first premolars (UFPs) with mesial–occlusal–distal (MOD) nanohybrid composite restorations under subcritical static load. FEM models were created to simulate four different clinical situations involving endodontically treated UFPs with MOD cavities restored with one of the following: composite resin; composite and one FP in the palatal root; composite and one FP in the buccal root; or composite and two FPs. As control, the model of an intact UFP was included. A simulated load of 150 N was applied. Stress distribution was observed on each model surface, on the mid buccal–palatal plane, and on two horizontal planes (at cervical and root-furcation levels); the maximum Von Mises stress values were calculated. All analyses were replicated three times, using the mechanical parameters from three different nanohybrid resin composite restorative materials. In the presence of FPs, the maximum stress values recorded on dentin (in cervical and root-furcation areas) appeared slightly reduced, compared to the endodontically treated tooth restored with no post; in the same areas, the overall Von Mises maps revealed more favorable stress distributions. FPs in maxillary premolars with MOD cavities can lead to a positive redistribution of potentially dangerous stress concentrations away from the cervical and the root-furcation dentin.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10091708