Cited by 62Bone health and osteoporosis researchBone fractures and treatmentsFatigue and fracture mechanics

Effects of Intracortical Porosity on Fracture Toughness in Aging Human Bone: A μCT-Based Cohesive Finite Element Study

Ural, Ani, Vashishth, Deepak·2007·Journal of Biomechanical Engineering

Abstract

The extent to which increased intracortical porosity affects the fracture properties of aging and osteoporotic bone is unknown. Here, we report the development and application of a microcomputed tomography based finite element approach that allows determining the effects of intracortical porosity on bone fracture by blocking all other age-related changes in bone. Previously tested compact tension specimens from human tibiae were scanned using microcomputed tomography and converted to finite element meshes containing three-dimensional cohesive finite elements in the direction of the crack growth. Simulations were run incorporating age-related increase in intracortical porosity but keeping cohesive parameters representing other age-related effects constant. Additional simulations were performed with reduced cohesive parameters. The results showed a 6% decrease in initiation toughness and a 62% decrease in propagation toughness with a 4% increase in porosity. The reduction in toughnesses became even more pronounced when other age-related effects in addition to porosity were introduced. The initiation and propagation toughness decreased by 51% and 83%, respectively, with the combined effect of 4% increase in porosity and decrease in the cohesive properties reflecting other age-related changes in bone. These results show that intracortical porosity is a significant contributor to the fracture toughness of the cortical bone and that the combination of computational modeling with advanced imaging improves the prediction of the fracture properties of the aged and the osteoporotic cortical bone.

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Crossref · 10.1115/1.2768377

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  • Cortical porosity is negatively correlated with fracture toughness.

    “Cortical porosity is negatively correlated with Young’s modulus (42), compressive ultimate stress (43), and fracture toughness (44).”

    From Bone Mechanical Properties in Healthy and Diseased States (2018) · cites this paper as [44]

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Authors
Ural, A., & Vashishth, D.
Affiliations
  • Department of Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180
  • Rensselaer Polytechnic Institute (US)
Venue
Journal of Biomechanical Engineering
Published
2007-02-09
Volume
129
Issue
5
Pages
625-631
ISSN
  • 0148-0731 (ISSN-L)
  • 1528-8951
OpenAlex
W2065638976
Cited by
62
References
59
Citations by year
2026: 4 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 4 · 2019: 6 · 2018: 4 · 2017: 2 · 2016: 5 · 2015: 3 · 2014: 6 · 2013: 3 · 2012: 4
FWCI
2.42
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Biomechanical Engineering (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (R01AG020618, AG020618)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Health Sciences › Medicine › Epidemiology › Bone fractures and treatments
  • Physical Sciences › Engineering › Mechanics of Materials › Fatigue and fracture mechanics
Keywords
cortical porosity, fracture toughness, aging bone, osteoporosis, cortical bone, compact tension specimens, human tibia, initiation toughness, crack propagation, micro-computed tomography
MeSH terms
Adult, Aged, 80 and over, Aging, Bone and Bones, Computer Simulation, Humans, Tibia, Tomography, X-Ray Computed, Porosity, Finite Element Analysis, Fractures, Bone

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