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Study on fracture behavior of molars based on three-dimensional high-precision computerized tomography scanning and numerical simulation

journal contribution
posted on 2023-05-21, 09:15 authored by Feng, X, Kou, W, Hongyuan LiuHongyuan Liu, Gong, B, Tang, C
A series of three-dimensional (3D) numerical simulations are conducted to investigate the gradual failure process of molars in this study. The real morphology and internal mesoscopic structure of a whole tooth are implemented into the numerical simulations through computerized tomography scanning, digital image processing, and 3D matrix mapping. The failure process of the whole tooth subject to compressions including crack initiation, crack propagation, and final failure pattern is reproduced using 3D realistic failure process analysis (RFPA3D) method. It is concluded that a series of microcracks are gradually initiated, nucleated, and subsequently interconnect to form macroscopic cracks when the teeth are under over-compressions. The propagation of the macroscopic cracks results in the formation of fracture surfaces and penetrating cracks, which are essential signs and manifestations of the tooth failure. Moreover, the simulations reveal that, the material heterogeneity is a critical factor that affects the mechanical properties and fracture modes of the teeth, which vary from crown fractures to crown-root fractures and root fractures depending on different homogeneity indices.

History

Publication title

International Journal for Numerical Methods in Biomedical Engineering

Volume

38

Article number

3561

Number

3561

Pagination

1-14

ISSN

2040-7939

Department/School

School of Engineering

Publisher

John Wiley & Sons Ltd.

Place of publication

United Kingdom

Rights statement

Copyright 2021 John Wiley & Sons, Ltd

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in engineering

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