Understanding Hip Fracture by QCT-Based Finite Element Modeling

In addition to the large magnitude of impact force induced in falling, the abnormal stress/strain patterns produced by the non-habitual loading condition in falling may be another external contributor to hip fracture

Hossein Kheirollahi

2017

Key concepts

Scholarcy highlights

  • Hip fracture has become a common health problem among old people
  • The objective of this study was to investigate the combined effect of reversed stress/strain patterns in femur and the inhomogeneous material properties of femur bone
  • We constructed 40 subject-specific femur finite element models from medical quantitative computed tomography and used them to identify high risk regions in the femur induced by the two loading configurations
  • The obtained results showed that compared to the single-leg stance, in the sideways fall the highest stress and strain occurred at different locations; and the tensile-compressive stress status was completely reversed
  • Previous studies have found that a bone has different strength at different anatomic sites, and at the same site it has different compressive and tensile strength
  • In addition to the large magnitude of impact force induced in falling, the abnormal stress/strain patterns produced by the non-habitual loading condition in falling may be another external contributor to hip fracture

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