Abstract
’stress shielding’ in the proximo-medial femur after hip replacement is studied for different prosthesis stem orientations (valgus — neutral — varus). Both axial and hoop stresses are reported for each case. Results are shown to compare favourably with strain gauge studies. It is predicted that valgus orientated stems create greater axial stress changes and varus orientated stems create greater hoop stress changes. The clinical practice of prosthesis insertion is discussed. Finally the results are analysed in the context of a proposed damage model for bone adaption. It is proposed that the hoop stress has greater significance for the’ stress shielding’ concept than its smaller magnitude would suggest.
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© 1991 Elsevier Science Publishers Ltd
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Prendergast, P.J., McCormack, B., Gunawardhana, T., Taylor, D. (1991). The Effect of Prosthesis Orientation on’ stress-Shielding’ using Finite Element Analysis — Indications as to Bone Remodeling. In: Williams, K.R., Toni, A., Middleton, J., Pallotti, G. (eds) Interfaces in Medicine and Mechanics—2. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3852-9_34
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DOI: https://doi.org/10.1007/978-94-011-3852-9_34
Publisher Name: Springer, Dordrecht
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