Comparison of geometry-based and CT voxel-based finite element modelling and experimental validation

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Lengsfeld, M.¹; Schmitt, J.¹; Alter, P.¹; Kaminsky, J.¹; Leppek, R.²

Comparison of geometry-based and CT voxel-based finite element modelling and experimental validation

Med Eng Phys. October 1998;20(7):515-522

©1998 IPEM. Published by Elsevier Science Ltd. All rights reserved.

Affiliations

¹Department of Orthopaedic Surgery, Philipps-University of Marburg, Marburg, Germany

²Department of Radiology, Philipps-University of Marburg, Marburg, Germany
Abstract and keywords

The objectives of the paper presented here is the comparison of a geometry-based and voxel-based finite element (FE) method preprocessor of the human femur. The models were experimentally validated by strain gauge measurements (principal stress).

The correlation coefficients (r) between the three methods (geometry-based FEM, voxel-based FEM, strain gauge measurements) were found to be in the range 0.91–0.94 (r²: 0.84–0.88). The relationships between the samples are highly significant (P=0.001), where the strain gauge results are the independent variables. These results suggest that the validity with respect to the principal stress of a voxel-based modelling is similar to the validity of geometry-based modelling. In summary, therefore, we conclude that voxel-based meshing allows a straightforward interfacing with computerized tomography (CT) scans and might contribute to a clinically applicable FEM technology.

Keywords: Femur; Finite element method; Meshing technique; Strain gauge
Links

DOI: 10.1016/S1350-4533(98)00054-X

PubMed: 9832027

WoS: 000076844900003
History

Received: 1997-10-09

Accepted: 1998-06-04

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2005	Kristen K-H, Berger K, Berger C, Kampla W, Anzböck W, Weitzel SH. The first metatarsal bone under loading conditions: a finite element analysis. Foot and Ankle Clinics. 2005;10(1):1-14.
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2007	Bessho M, Ohnishi I, Matsuyama J, Matsumoto T, Imai K, Nakamura K. Prediction of strength and strain of the proximal femur by a CT-based finite element method. J Biomech. 2007;40(8):1745-1753.
2010	Chen G, Schmutz B, Epari D, Rathnayaka K, Ibrahim S, Schuetz MA, Pearcy MJ. A new approach for assigning bone material properties from CT images into finite element models. J Biomech. 2010;43(5):1011-1015.
2003	Crawford RP, Rosenberg WS, Keaveny TM. Quantitative computed tomography-based finite element models of the human lumbar vertebral body: effect of element size on stiffness, damage, and fracture strength predictions. J Biomech Eng. August 2003;125(4):434-438.
2008	Gray HA, Taddei F, Zavatsky AB, Cristofolini L, Gill HS. Experimental validation of a finite element model of a human cadaveric tibia. J Biomech Eng. June 2008;130(3):031016.
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2001	Keyak JH, Rossi SA, Jones K, Les CM, Skinner HB. Prediction of fracture location in the proximal femur using finite element models. Med Eng Phys. November 2001;23(9):657-664.
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2007	Taddei F, Schileo E, Helgason B, Cristofolini L, Viceconti M. The material mapping strategy influences the accuracy of ct-based finite element models of bones: an evaluation against experimental measurements. Med Eng Phys. 2007;29(9):973-979.
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2006	Yang S. Animal Experiment (rabbit) to Demonstrate Changes in Trabecular Bone Mechanical Properties Over Time Using Finite Element Analysis [PhD thesis]. Louisville, KY: University of Louisville; December 2006.
1999	Schaffner G. Assessment of Hip Fracture Risk in Astronauts Exposed to Long-Term Weightlessness [PhD thesis]. Cambridge, MA: Massachusetts Institute of Technology; August 1999.
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2023	Branni MG. Constitutive Models of Bone: The Human Femur [PhD thesis]. Queensland University of Technology; 2023.
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2016	Firminger CR. Effects of Minimalist Footwear and Stride Length Reduction on Metatarsal Strains and the Probability of Stress Fracture in Running [Master's thesis]. Calgary, AB: University of Calgary; July 2016.
2003	Fox JC. Biomechanics of the Proximal Femur: Role of Bone Distribution and Architecture [PhD thesis]. Berkeley, CA: Berkeley, University of California; 2003.
2011	Saito E. Designed Biodegradable and Osteoconductive Porous Scaffolds for Human Trabecular Bone [PhD thesis]. University of Michigan; 2011.
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