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Comparison of conventional and hybrid modulus press-fit proximal femoral prostheses

Comparison of conventional and hybrid modulus press-fit proximal femoral prostheses
Comparison of conventional and hybrid modulus press-fit proximal femoral prostheses
The aim of the this study was to compare the load transfer mechanisms of a standard press-fit proximal femoral prosthesis fabricated from three conventional implant materials, cobalt- chrome, titanium and an 'isoelastic' material with that produced by a hybrid modulus prosthesis using the finite element method In particular, both the periosteal and the endosteal bone stresses were examined.
Comparison of the results from the three conventional implant materials were similar to those reported in the literature, with the isoelastic prosthesis producing the least stress shielding of the proximal medial femur and the stiffer implant materials producing low proximal medial interface pressures and cancellous bone stress distributions. The hybrid prosthesis combined these features to produce, overall, the most favourable periosteal and endosteal stress distributions. However, all of the prostheses produced stresses which approach or exceeded the fatigue strength of the supporting cancellous bone suggesting that all would have high migration rates and correspondingly high rates of late aseptic loosening.
1853124559
127-139
Wessex Institute of Technology
Simoes, J.A.O.
19f41676-3281-40ae-9ec5-6209abd447de
Taylor, M.
bdd7186d-4fda-4a39-bddb-9fcbbe25fcaa
Brebbia, C.A.
Cerrolaza, M.
Jugo, D.
Simoes, J.A.O.
19f41676-3281-40ae-9ec5-6209abd447de
Taylor, M.
bdd7186d-4fda-4a39-bddb-9fcbbe25fcaa
Brebbia, C.A.
Cerrolaza, M.
Jugo, D.

Simoes, J.A.O. and Taylor, M. (1996) Comparison of conventional and hybrid modulus press-fit proximal femoral prostheses. In, Brebbia, C.A., Cerrolaza, M. and Jugo, D. (eds.) Transactions on Biomedicine and Health: Simulation Modelling in Bioengineering. (Transactions of the Wessex Institute, 3) Ashurst, UK. Wessex Institute of Technology, pp. 127-139.

Record type: Book Section

Abstract

The aim of the this study was to compare the load transfer mechanisms of a standard press-fit proximal femoral prosthesis fabricated from three conventional implant materials, cobalt- chrome, titanium and an 'isoelastic' material with that produced by a hybrid modulus prosthesis using the finite element method In particular, both the periosteal and the endosteal bone stresses were examined.
Comparison of the results from the three conventional implant materials were similar to those reported in the literature, with the isoelastic prosthesis producing the least stress shielding of the proximal medial femur and the stiffer implant materials producing low proximal medial interface pressures and cancellous bone stress distributions. The hybrid prosthesis combined these features to produce, overall, the most favourable periosteal and endosteal stress distributions. However, all of the prostheses produced stresses which approach or exceeded the fatigue strength of the supporting cancellous bone suggesting that all would have high migration rates and correspondingly high rates of late aseptic loosening.

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Published date: 1996

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Local EPrints ID: 21212
URI: http://eprints.soton.ac.uk/id/eprint/21212
ISBN: 1853124559
PURE UUID: 8098818c-a2aa-4478-9e6d-c9e986e6af5e

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Date deposited: 10 Nov 2006
Last modified: 09 Jan 2024 17:39

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Contributors

Author: J.A.O. Simoes
Author: M. Taylor
Editor: C.A. Brebbia
Editor: M. Cerrolaza
Editor: D. Jugo

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