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. 2013 Jun;35(6):860-5.
doi: 10.1016/j.medengphy.2013.01.003. Epub 2013 Feb 1.

Patient-specific finite element modeling for femoral bone augmentation

Ehsan Basafa  1 , Robert S Armiger, Michael D Kutzer, Stephen M Belkoff, Simon C Mears, Mehran Armand
Affiliations

Patient-specific finite element modeling for femoral bone augmentation

Ehsan Basafa et al. Med Eng Phys. 2013 Jun.

Abstract

The aim of this study was to provide a fast and accurate finite element (FE) modeling scheme for predicting bone stiffness and strength suitable for use within the framework of a computer-assisted osteoporotic femoral bone augmentation surgery system. The key parts of the system, i.e. preoperative planning and intraoperative assessment of the augmentation, demand the finite element model to be solved and analyzed rapidly. Available CT scans and mechanical testing results from nine pairs of osteoporotic femur bones, with one specimen from each pair augmented by polymethylmethacrylate (PMMA) bone cement, were used to create FE models and compare the results with experiments. Correlation values of R(2)=0.72-0.95 were observed between the experiments and FEA results which, combined with the fast model convergence (~3 min for ~250,000 degrees of freedom), makes the presented modeling approach a promising candidate for the intended application of preoperative planning and intraoperative assessment of bone augmentation surgery.

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Conflict of interest statement

Conflict of interest statement

None declared.

Figures

Fig. 1
Fig. 1
Oblique user-defined slices (left) and the corresponding finite element mesh (right). The gray circles represent the control points that determine the properties of the curve of the slices.
Fig. 2
Fig. 2
Stiffness (left) and absorbed energy (right) as a function of mesh density.
Fig. 3
Fig. 3
Comparison of stiffness (left) and yield load (right) values between experiments and FEA analyses.
See this image and copyright information in PMC

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