Comparison of femoral strength and fracture risk index derived from DXA-based finite element analysis for stratifying hip fracture risk: A cross-sectional study

Bone ◽  
2018 ◽  
Vol 110 ◽  
pp. 386-391 ◽  
Author(s):  
Shuman Yang ◽  
Yunhua Luo ◽  
Lang Yang ◽  
Enrico Dall'Ara ◽  
Richard Eastell ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hip Fracture ◽  
Fracture Risk ◽  
Risk Index ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Element Analysis ◽  
Cross Sectional ◽  
Fracture Risk Index

Finite Element Analysis of Proximal Femur QCT Scans for the Assessment of Hip Fracture Risk In Older Men

2008 ◽  
Vol 11 (3) ◽  
pp. 467-468 ◽  
Author(s):  
Tony M. Keaveny ◽  
Lynn M. Marshall ◽  
Carrie M. Nielson ◽  
Steven R. Cummings ◽  
Paul F. Hoffmann ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hip Fracture ◽  
Fracture Risk ◽  
Proximal Femur ◽  
Older Men ◽  
Element Analysis ◽  
Hip Fracture Risk

scholarly journals Finite Element Analysis of the Proximal Femur and Hip Fracture Risk in Older Men

2009 ◽  
Vol 24 (3) ◽  
pp. 475-483 ◽  
Author(s):  
Eric S Orwoll ◽  
Lynn M Marshall ◽  
Carrie M Nielson ◽  
Steven R Cummings ◽  
Jodi Lapidus ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hip Fracture ◽  
Fracture Risk ◽  
Proximal Femur ◽  
Older Men ◽  
Element Analysis ◽  
Hip Fracture Risk

scholarly journals Assessment of Hip Fracture Risk Using Cross-Section Strain Energy Determined by QCT-Based Finite Element Modeling

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Hossein Kheirollahi ◽  
Yunhua Luo
Keyword(s):  
Finite Element ◽  
Hip Fracture ◽  
Fracture Risk ◽  
Cross Section ◽  
Strain Energy ◽  
Risk Index ◽  
Accurate Assessment ◽  
Hip Fracture Risk ◽  
Study Results ◽  
Fracture Risk Index

Accurate assessment of hip fracture risk is very important to prevent hip fracture and to monitor the effect of a treatment. A subject-specific QCT-based finite element model was constructed to assess hip fracture risk at the critical locations of femur during the single-leg stance and the sideways fall. The aim of this study was to improve the prediction of hip fracture risk by introducing a novel failure criterion to more accurately describe bone failure mechanism. Hip fracture risk index was defined using cross-section strain energy, which is able to integrate information of stresses, strains, and material properties affecting bone failure. It was found that the femoral neck and the intertrochanteric region have higher fracture risk than other parts of the femur, probably owing to the larger content of cancellous bone in these regions. The study results also suggested that women are more prone to hip fracture than men. The findings in this study have a good agreement with those clinical observations reported in the literature. The proposed hip fracture risk index based on strain energy has the potential of more accurate assessment of hip fracture risk. However, experimental validation should be conducted before its clinical applications.

Mechanical Design, Additive Manufacturing, and Performance of Equal Volume Metamaterials

2021 ◽  
Author(s):  
Richárd Horváth ◽  
Vendel Barth ◽  
Viktor Gonda ◽  
Mihály Réger ◽  
Imre Felde
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Absorption ◽  
Mechanical Design ◽  
Area Under The Curve ◽  
Cell Number ◽  
Element Analysis ◽  
Cross Sectional ◽  
Unit Cells ◽  
And Performance

Abstract In this paper, we study the energy absorption of metamaterials composed of unit cells whose special geometry makes the cross-sectional area and the volume of the bodies generated from them constant (for the same enclosing box dimensions). After a parametric description of such special geometries, we analyzed by finite element analysis the deformation of the metamaterials we have designed during compression. We 3D printed the designed metamaterials from plastic to subject them to real compression. The results of the finite element analysis were compared with the real compaction results. Then, for each test specimen, we plotted its compaction curve. By fitting a polynomial to the compaction curves and integrating it (area under the curve), the energy absorption of the samples can be obtained. As a result of these investigations, we drew a conclusion about the relationship between energy absorption and cell number.

scholarly journals Skeletal Microstructure and Estimated Bone Strength Improve Following Parathyroidectomy in Primary Hyperparathyroidism

2017 ◽  
Vol 103 (1) ◽  
pp. 196-205 ◽  
Author(s):  
Natalie E Cusano ◽  
Mishaela R Rubin ◽  
Barbara C Silva ◽  
Yu-Kwang Donovan Tay ◽  
John M Williams ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bone Density ◽  
Primary Hyperparathyroidism ◽  
Fracture Risk ◽  
Bone Strength ◽  
Failure Load ◽  
Mineral Density ◽  
Element Analysis ◽  
Volumetric Bone Density

Abstract Context High-resolution peripheral quantitative computed tomography (HRpQCT) is a noninvasive imaging technology that can provide insight into skeletal microstructure and strength. In asymptomatic primary hyperparathyroidism (PHPT), HRpQCT imaging has demonstrated both decreased cortical and trabecular indices, consistent with evidence for increased fracture risk. There are limited data regarding changes in HRpQCT parameters postparathyroidectomy. Objective To evaluate changes in skeletal microstructure by HRpQCT in subjects with PHPT after parathyroidectomy. Design We studied 29 subjects with PHPT (21 women, 8 men) with HRpQCT at baseline and 6, 12, 18, and 24 months postparathyroidectomy. Main Outcome Measures Volumetric bone mineral density, microarchitectural indices, and finite element analysis at the distal radius and tibia. Results At both the radius and tibia, there were significant improvements in total, cortical, and trabecular volumetric bone density as early as 6 months postparathyroidectomy (24-month values for total volumetric bone density, radius: +2.8 ± 4%, tibia: +4.4 ± 4%; P < 0.0001 for both), cortical thickness (radius: +1.1 ± 2%, tibia: +2.0 ± 3%; P < 0.01 for both), and trabecular bone volume (radius: +3.8 ± 5%, tibia: +3.2 ± 4%; P < 0.0001 for both). At both sites, by finite element analysis, stiffness and failure load were improved starting at 6 months postparathyroidectomy (24-month values for failure load, radius: +6.2 ± 6%, tibia: +4.8 ± 7%; P < 0.0001 for both). Conclusions These results provide information about skeletal microarchitecture in subjects with PHPT followed through 2 years after parathyroidectomy. Estimated bone strength is improved, consistent with data showing decreased fracture risk postparathyroidectomy.

Sign in / Sign up

Export Citation Format

Share Document