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Location and length of gap at the interface of an idealized cemented hip implant subjected to bending

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2 Author(s)
N. Nuno-Siebrecht ; Dipt. di Elettronica Inf. e Sistemistica, Bologna Univ., Italy ; G. Avanzolini

The uncertainties of the residual stresses developed during cement polymerization and of the coefficient of friction were considered in the 3-D finite element model using nonlinear contact elements to model the debonded interface. An accurate modeling of the residual stresses and coefficient of friction are important to predict the gap lengths; for an interference of 0.05 mm and a coefficient of friction of 0.4, no gap was observed. These indicate possible true gap locations at the interface which could lead to initial loss of fixation of the implant

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Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE  (Volume:2 )

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