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Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities
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Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities

Published on: May 24, 2022

A two-stage shape optimization process for cavity preparation.

Li Shi1, Alex S L Fok, Alison Qualtrough

  • 1School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M60 1QD, UK.

Dental Materials : Official Publication of the Academy of Dental Materials
|June 6, 2008
PubMed
Summary
This summary is machine-generated.

Optimizing dental cavity shapes using computational methods significantly reduces stress at the tooth-restoration interface. This approach is expected to enhance the longevity of dental restorations and protect teeth from fracture.

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Area of Science:

  • Biomaterials Science
  • Computational Mechanics
  • Dental Engineering

Background:

  • Restored teeth are prone to fracture due to high stresses at the tooth-restoration interface, particularly after debonding.
  • Minimizing these interfacial stresses is crucial for improving the durability of dental restorations.

Purpose of the Study:

  • To minimize interfacial stresses in dental restorations by optimizing cavity preparation shapes.
  • To investigate the efficacy of modern shape optimization techniques in dental applications.

Main Methods:

  • Incorporation of shape optimization methods, based on biological adaptive growth, into a finite element program (ABAQUS).
  • Utilized topological optimization for initial cavity shape design, followed by refinement to account for reduced interfacial bond strength.
  • Developed a User Material Subroutine (UMAT) to automate the optimization process.

Main Results:

  • The optimized cavity design demonstrated a significant reduction in stress levels at the tooth-restoration interface compared to conventional designs.
  • This stress reduction was observed irrespective of the bonding condition between the tooth and the restoration.

Conclusions:

  • Finite-element based shape optimization is an effective tool for minimizing interfacial stresses in dental restorations.
  • Optimized cavity designs hold the potential to prolong the longevity of restored teeth and reduce fracture risk.