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Osteoporosis International

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Open Access 01-07-2019 | Original Article

Validation of distal radius failure load predictions by homogenized- and micro-finite element analyses based on second-generation high-resolution peripheral quantitative CT images

Authors: A. J. Arias-Moreno, H. S. Hosseini, M. Bevers, K. Ito, P. Zysset, B. van Rietbergen

Published in: Osteoporosis International | Issue 7/2019

Abstract

Summary

This study developed a well-standardized and reproducible approach for micro-finite element (mFE) and homogenized-FE (hFE) analyses that can accurately predict the distal radius failure load using either mFE or hFE models when using the approaches and parameters developed in this study.

Introduction

Micro-FE analyses based on high-resolution peripheral quantitative CT (HR-pQCT) images are frequently used to predict distal radius failure load. With the introduction of a second-generation HR-pQCT device, however, the default modelling approach no longer provides accurate results. The aim of this study was to develop a well-standardized and reproducible approach for mFE and hFE analyses that can provide precise and accurate results for distal radius failure load predictions based on second-generation HR-pQCT images.

Methods

Second-generation HR-pQCT was used to scan the distal 20-mm section of 22 cadaver radii. The sections were excised and mechanically tested afterwards. For these sections, mFE and hFE models were made that were used to identify required material parameters by comparing predicted and measured results. Using these parameters, the models were cropped to represent the 10-mm region recommended for clinical studies to test their performance for failure load prediction.

Results

After identification of material parameters, the measured failure load of the 20-mm segments was in good agreement with the results of mFE models (R² = 0.969, slope = 1.035) and hFE models (R² = 0.966, slope = 0.890). When the models were restricted to the clinical region, mFE still accurately predicted the measured failure load (R² = 0.955, slope = 1.021), while hFE predictions were precise but tended to overpredict the failure load (R² = 0.952, slope = 0.780).

Conclusions

It was concluded that it is possible to accurately predict the distal radius failure load using either mFE or hFE models when using the approaches and parameters developed in this study.

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Title: Validation of distal radius failure load predictions by homogenized- and micro-finite element analyses based on second-generation high-resolution peripheral quantitative CT images
Authors: A. J. Arias-Moreno
H. S. Hosseini
M. Bevers
K. Ito
P. Zysset
B. van Rietbergen
Publication date: 01-07-2019
Publisher: Springer London
Published in: Osteoporosis International / Issue 7/2019
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-019-04935-6

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Validation of distal radius failure load predictions by homogenized- and micro-finite element analyses based on second-generation high-resolution peripheral quantitative CT images

Abstract

Summary

Introduction

Methods

Results

Conclusions

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Abstract

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