Journal article
Fracture micromechanics of human dentin: A microscale numerical model
Journal of the mechanical behavior of biomedical materials, v 114, 104171
01 Feb 2021
PMID: 33218927
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In the present study, we investigate the effects of microstructural morphology and heterogeneity on the initiation and propagation of microcracks in dentin. We create 2D pre-cracked models of human dentin at the microscale level and use a brittle fracture framework of the phase-field method to analyze the crack growth. We discuss the influence of the microstructural features on crack deflection, microcracking, and uncracked ligament bridging through various regions in dentin. The results demonstrate that the difference between the critical energy release rates of peritubular (PTD) and intertubular dentin (ITD) has considerable impacts on microcracking. Our simulations reveal that tubules surrounded by PTDs play an important role in the crack deflection. Our results also indicate that the toughness of dentin increases from the inner to outer dentin. In conclusion, the findings in our study provide valuable insights into the fracture behavior in various regions of dentin.
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Details
- Title
- Fracture micromechanics of human dentin: A microscale numerical model
- Creators
- Ebrahim Maghami - Drexel UniversityReza Pejman - Drexel UniversityAhmad R. Najafi - Drexel University
- Publication Details
- Journal of the mechanical behavior of biomedical materials, v 114, 104171
- Publisher
- Elsevier
- Number of pages
- 12
- Grant note
- Department of Mechanical Engineering and Mechanics at the Drexel University C000072548 / Commonwealth of Pennsylvania, Department of Community and Economic Development by the Manufacturing Pennsylvania Innovation Program to Carnegie Mellon
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000608249200007
- Scopus ID
- 2-s2.0-85096158266
- Other Identifier
- 991019168818204721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials