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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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Development of Micro-CT-Based Anatomically Accurate Tooth Model for Finite Element Analysis of Composite

Tamás Tarjányi1, Balázs Szabó2, Lívia Vásárhelyi3

  • 1Department of Medical Physics and Informatics, University of Szeged, Korányi Fasor 9, 6720 Szeged, Hungary.

Dentistry Journal
|May 26, 2026
PubMed
Summary

Accurate 3D tooth models from micro-CT scans improve finite element analysis (FEA) in restorative dentistry. These models reveal stress patterns in composite restorations under various loads, aiding material and treatment optimization.

Keywords:
3D CADCT scanfinite element analysismechanical stresssimulationteeth

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Area of Science:

  • Biomaterials Science
  • Dental Biomechanics
  • Computational Modeling

Background:

  • Finite element analysis (FEA) is crucial for understanding stress in dental restorations.
  • Traditional FEA models often lack anatomical accuracy, limiting biomechanical insights.
  • Accurate tooth geometry is essential for reliable stress distribution analysis.

Purpose of the Study:

  • To develop an anatomically precise 3D tooth model using micro-computed tomography (micro-CT) data.
  • To evaluate the biomechanical behavior of sound and composite-restored teeth.
  • To analyze stress distribution under clinically relevant loading conditions.

Main Methods:

  • High-resolution micro-CT scanning of a human tooth.
  • Segmentation and 3D reconstruction of enamel, dentin, and pulp using CAD tools.
  • Finite element analysis simulations under vertical and oblique loading (200 N).

Main Results:

  • Maximum von Mises stresses reached ~140 MPa, concentrated in coronal regions.
  • Oblique loading induced greater, more asymmetric stress concentrations than vertical loading.
  • Composite restorations showed locally increased stress under oblique loading compared to sound teeth.

Conclusions:

  • Micro-CT-based, anatomically accurate FEA models offer a robust platform for dental biomechanics.
  • The workflow facilitates detailed stress evaluation in composite-restored teeth.
  • This approach can enhance understanding and optimization of restorative materials and techniques.