Open Access

ARTICLE

Hip Fracture Risk Assessment Based on Different Failure Criteria Using QCT-Based Finite Element Modeling

Hossein Bisheh^{1, 2}, Yunhua Luo^{1, 3}, Timon Rabczuk^{4, *}

1 Department of Mechanical Engineering, University of Manitoba, Winnipeg, R3T 5V6, Canada.
2 Institute of Structural Mechanics, Bauhaus-Universität Weimar, Weimar, 99423, Germany.
3 Department of Biomedical Engineering, University of Manitoba, Winnipeg, R3T 5V6, Canada.
4 Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam.

* Corresponding Author: Timon Rabczuk. Email: .

Computers, Materials & Continua 2020, 63(2), 567-591. https://doi.org/10.32604/cmc.2020.09393

Received 09 December 2019; Accepted 06 January 2020; Issue published 01 May 2020

Abstract

Precise evaluation of hip fracture risk leads to reduce hip fracture occurrence in individuals and assist to check the effect of a treatment. A subject-specific QCT-based finite element model is introduced to evaluate hip fracture risk using the strain energy, von-Mises stress, and von-Mises strain criteria during the single-leg stance and the sideways fall configurations. Choosing a proper failure criterion in hip fracture risk assessment is very important. The aim of this study is to define hip fracture risk index using the strain energy, von Mises stress, and von Mises strain criteria and compare the calculated fracture risk indices using these criteria at the critical regions of the femur. It is found that based on these criteria, the hip fracture risk at the femoral neck and the intertrochanteric region is higher than other parts of the femur, probably due to the larger amount of cancellous bone in these regions. The study results also show that the strain energy criterion gives more reasonable assessment of hip fracture risk based on the bone failure mechanism and the von-Mises strain criterion is more conservative than two other criteria and leads to higher estimate of hip fracture risk indices.

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