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FEM analysis of the tridimensionnel effect of microvoids on the PMMA behaviour in PTH.
Abstract
The performance and success of cemented total hip arthroplasty is related to the stress fields in the cement mantle due to the loading caused by patient activities. To do this, a three dimensional linear elastic model was developed to investigate the intensity and distribution of equivalent stress in the bone cement (PMMA) between the microvoids. This analysis is made according to several parameters such as the size of the microvoids defects, its direction of the arrangement, its location in the seat of the stress concentration and the volume fraction of the microvoids (the microvoid-microvoid interdistance).
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