Morselized corticocancellous bone (MCB) is widely used in revision surgery with and without impaction. In the current study material parameters for the nonlinear viscoelastic and plastic responses of impacted and unimpacted human MCBs were determined during constrained compression. These models may be useful in finite element analyses of surgical constructs involving impacted and unimpacted MCBs. MCB is impacted layer by layer in the femoral canal during revision surgery. The influence of different layers on the mechanical properties was therefore also examined by comparing the relaxation strength and elastic and plastic strains for bone pellets impacted in one and two layers during constrained compression of human MCB. The relaxation strength was found to increase significantly by 14% for two layer pellets compared to one layer pellets, and the plastic strains decreased significantly by 15%, while the elastic strains were similar.
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December 2008
Research Papers
Constitutive Models for Constrained Compression of Unimpacted and Impacted Human Morselized Bone Grafts
Knut B. Lunde,
Knut B. Lunde
Department of Structural Engineering,
Norwegian University of Science and Technology
, 7491 Trondheim, Norway
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Olav A. Foss,
Olav A. Foss
Norwegian Orthopaedic Implant Research Unit, NKSOI,
St. Olav University Hospital
, 7489 Trondheim, Norway
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Lars Fosse,
Lars Fosse
Norwegian Orthopaedic Implant Research Unit, NKSOI,
St. Olav University Hospital
, 7489 Trondheim, Norway
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Bjørn Skallerud
Bjørn Skallerud
Department of Structural Engineering,
e-mail: bjorn.skallerud@ntnu.no
Norwegian University of Science and Technology
, 7491 Trondheim, Norway
Search for other works by this author on:
Knut B. Lunde
Department of Structural Engineering,
Norwegian University of Science and Technology
, 7491 Trondheim, Norway
Olav A. Foss
Norwegian Orthopaedic Implant Research Unit, NKSOI,
St. Olav University Hospital
, 7489 Trondheim, Norway
Lars Fosse
Norwegian Orthopaedic Implant Research Unit, NKSOI,
St. Olav University Hospital
, 7489 Trondheim, Norway
Bjørn Skallerud
Department of Structural Engineering,
Norwegian University of Science and Technology
, 7491 Trondheim, Norwaye-mail: bjorn.skallerud@ntnu.no
J Biomech Eng. Dec 2008, 130(6): 061014 (8 pages)
Published Online: October 15, 2008
Article history
Received:
November 21, 2007
Revised:
May 18, 2008
Published:
October 15, 2008
Citation
Lunde, K. B., Foss, O. A., Fosse, L., and Skallerud, B. (October 15, 2008). "Constitutive Models for Constrained Compression of Unimpacted and Impacted Human Morselized Bone Grafts." ASME. J Biomech Eng. December 2008; 130(6): 061014. https://doi.org/10.1115/1.2979878
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