An investigation was performed to determine the effects of the presence of two lengths of proximal Mu¨ller prosthesis on predicted failure loads, as compared to those for an intact femur. Three-dimensional stresses in a bone/cement/prosthesis system were determined using finite element methods, with both isotropic and transversely isotropic material properties used for the diaphyseal cortex. Significant increases in prosthesis stem stresses were found when the transversely isotropic material properties were employed in the diaphyseal cortex. This leads to the conclusion that accurate anisotropic material properties for bone are essential for precise stress determination and optimum design in prosthetic implants. Failure loads were also predicted for vertical compression and axial torque, similar to available experimental conditions, and were within the range of the experimental failure data found in the literature. The technique developed herein can be used to systematically assess existing as well as future implant designs, taking into account the complex three-dimensional interaction effects of the overall bone/cement/prosthesis system.
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February 1986
Research Papers
Stress Analysis and Failure Prediction in the Proximal Femur Before and After Total Hip Replacement
H. H. Vichnin,
H. H. Vichnin
General Electric Space Division, Valley Forge, Pa.
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S. C. Batterman
S. C. Batterman
Department of Bioengineering, University of Pennsylvania, Philadelphia, Pa. 19104
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H. H. Vichnin
General Electric Space Division, Valley Forge, Pa.
S. C. Batterman
Department of Bioengineering, University of Pennsylvania, Philadelphia, Pa. 19104
J Biomech Eng. Feb 1986, 108(1): 33-41 (9 pages)
Published Online: February 1, 1986
Article history
Received:
May 22, 1983
Revised:
August 27, 1985
Online:
June 12, 2009
Citation
Vichnin, H. H., and Batterman, S. C. (February 1, 1986). "Stress Analysis and Failure Prediction in the Proximal Femur Before and After Total Hip Replacement." ASME. J Biomech Eng. February 1986; 108(1): 33–41. https://doi.org/10.1115/1.3138577
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