A physico-mathematical model for the human femur, with and without a prosthesis, under the static constraints of one-legged stance

The authors present a physico-mathematical model of a human femur, under "monopodal" static constraints, using the finite elements method. Three examples are considered: a normal femur, a femur implanted with a short-stem prosthesis without cement, and a femur implanted with a long-stem pr...

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Veröffentlicht in:Surgical and radiologic anatomy (English ed.) 1987-11, Vol.9 (3), p.241-249
Hauptverfasser: Ferré, J C, Legoux, R, Marquet, F, Chevalier, C, Helary, J L, Lumineau, J P, Le Cloarec, A Y, Orio, E, Barbin, J G, Barbin, J Y
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Sprache:eng
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Zusammenfassung:The authors present a physico-mathematical model of a human femur, under "monopodal" static constraints, using the finite elements method. Three examples are considered: a normal femur, a femur implanted with a short-stem prosthesis without cement, and a femur implanted with a long-stem prosthesis without cement. The lines of isoconstraints were compared in the three examples, as well as the main constraints (direction and intensity). From the results, the authors suggest that a prosthesis made of titanium is currently best even though its YOUNG's modulus differs from that of the bone. A prosthesis of composite material is possible in the future. While the intensity of the constraints is nearly the same at the level of the epiphysis for the short-stem and long-stem prosthesis it seems that the short-stem prosthesis fitted accurately without cement is the best solution. The introduction of a hip prosthesis modifies the normal curve of the loaded femur by changing the center of this curve.
ISSN:0930-1038
1279-8517
DOI:10.1007/BF02109635