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Study on fracture behavior of molars based on three‐dimensional high‐precision computerized tomography scanning and numerical simulation
Faculty of Infrastructure Engineering Dalian University of Technology Dalian China.ORCID iD: 0000-0002-2379-1103
Umeå University, Faculty of Medicine, Department of Odontology, Dental Technology/Dental Materials Science.
College of Science and Engineering University of Tasmania Hobart Australia.
Faculty of Infrastructure Engineering Dalian University of Technology Dalian China;Department of Civil and Environmental Engineering Brunel University London London UK.
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2022 (English)In: International Journal for Numerical Methods in Biomedical Engineering, ISSN 2040-7939, E-ISSN 2040-7947, Vol. 38, no 3, article id e3561Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 38, no 3, article id e3561
National Category
Biomaterials Science
Identifiers
URN: urn:nbn:se:umu:diva-190525DOI: 10.1002/cnm.3561ISI: 000730990200001PubMedID: 34865323Scopus ID: 2-s2.0-85121364416OAI: oai:DiVA.org:umu-190525DiVA, id: diva2:1621083
Available from: 2021-12-17 Created: 2021-12-17 Last updated: 2022-07-22Bibliographically approved

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Kou, Wen

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CiteExportLink to record
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