Stress distribution in endocrowns with different materials and loading conditions: a FEM study

Dragoslav Lazic; Milan Bojovic; Milan Blagojevic; Jelena Vulovic; Sanja Jovanovic

doi:10.37190/abb/218065

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Stress distribution in endocrowns with different materials and loading conditions: a FEM study

Acta of Bioengineering and Biomechanics

Volume 27 (2025): Issue 4 (December 2025)

By: Dragoslav Lazic, Milan Bojovic, Milan Blagojevic, Jelena Vulovic and Sanja Jovanovic

Open Access

|Apr 2026

Abstract

Purpose: This study aimed to evaluate the effect of different restorative materials on stress distribution in endodontically treated teeth restored with endocrowns using the finite element analysis (FEA).

Methods: Six test groups were defined according to restorative material: (1) polyetheretherketone (PEEK) with composite veneer, (2) carbon fiber-reinforced PEEK (CFR-PEEK) with composite veneer, (3) glass fiber-reinforced PEEK (GFR-PEEK) with composite veneer, (4) cobalt–chromium (Co-Cr) alloy with ceramic veneer, (5) monolithic lithium disilicate (LiDi) and (6) monolithic zirconium dioxide (Y-TZP). Mandibular molar models were designed in SolidWorks 2018 and Meshmixer and analyzed using ANSYS 16.0 under occlusal (400–600 N) and lateral (200–400 N) loading. Stress distribution in dentin was assessed using the von Mises criterion.

Results: LiDi demonstrated a uniform and diffuse stress distribution with minimal peak variations, favoring its use under lateral loading. GFR-PEEK significantly reduced the dentin volume exposed to critical stress thresholds under high occlusal forces. In contrast, Co-Cr alloy and Y-TZP exhibited greater stiffness, resulting in less favorable stress transfer and pronounced concentration zones compared with PEEK-based materials and LiDi.

Conclusions: The restorative material has a decisive influence on the biomechanical behavior of endocrowns. LiDi appears more suitable for premolars predominantly subjected to lateral forces, while GFR-PEEK offers superior protection in molars exposed to heavy occlusal loading.

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Articles in this issue

DOI: https://doi.org/10.37190/abb/218065 | Journal eISSN: 2450-6303 | Journal ISSN: 1509-409X

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Language: English

Page range: 161 - 171

Submitted on: Oct 29, 2025

Accepted on: Feb 11, 2026

Published on: Apr 8, 2026

Published by: Wroclaw University of Science and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

endocrowns,

finite element analysis,

stress distribution,

restorative materials,

endodontically treated teeth

Related subjects:

Engineering,

Bioengineering and biomedical engineering,

Cellular and tissue engineering,

Biomechanics,

Medicine,

Biomedical engineering,

Materials sciences,

Biomaterials and natural materials

© 2026 Dragoslav Lazic, Milan Bojovic, Milan Blagojevic, Jelena Vulovic, Sanja Jovanovic, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 27 (2025): Issue 4 (December 2025)