Finite element modelling of the vibrational behaviour of the human femur using CT-based individualized geometrical and material properties.

Frequency analysis of long bones has been investigated as a tool to assess bone quality or integrity. The objective of the present paper was to develop a three-dimensional finite element model of a fresh human femur with geometrical and mechanical properties derived from quantitative computer tomography images. This model was then exercised and the results were compared to those obtained from a vibration analysis technique. The percent relative error between the numerically and experimentally derived results was found about 4%. Finally, the influence of mechanical properties on the resonant spectre was studied. The results exhibit the limitations of the vibrational technique to detect slight material changes.

[1]  U Helfenstein,et al.  Elastic properties of cortical bone in female human femurs. , 1976, Journal of biomechanics.

[2]  E. Bovill,et al.  Evaluation of the use of resonant frequencies to characterize physical properties of human long bones. , 1974, Journal of biomechanics.

[3]  J. J. Thomsen,et al.  Modelling human tibia structural vibrations. , 1990, Journal of biomechanics.

[4]  S Saha,et al.  The effect of soft tissue on wave-propagation and vibration tests for determining the in vivo properties of bone. , 1977, Journal of biomechanics.

[5]  D Orne,et al.  The effects of variable mass and geometry, pretwist, shear deformation and rotatory inertia on the resonant frequencies of intact long bones: a finite element model analysis. , 1976, Journal of biomechanics.

[6]  Marle-Christine Hobatho,et al.  Atlas of mechanical properties of human cortical and cancellous bone , 1992 .

[7]  R. B. Ashman,et al.  Relations of mechanical properties to density and CT numbers in human bone. , 1995, Medical engineering & physics.

[8]  G Van der Perre,et al.  Identification of in-vivo vibration modes of human tibiae by modal analysis. , 1983, Journal of biomechanical engineering.

[9]  J P Morucci,et al.  Development of a three-dimensional finite element model of a human tibia using experimental modal analysis. , 1991, Journal of biomechanics.

[10]  J M Jurist,et al.  Mechanical impedance of the femur: a preliminary report. , 1971, Journal of biomechanics.

[11]  L. A. Taber,et al.  Vibrational characteristics of the embalmed human femur , 1981 .

[12]  J W Dunn,et al.  Response of human femur to mechanical vibration. , 1991, Journal of biomedical engineering.