Effect of simplifications of bone and components inclination on the elastohydrodynamic lubrication modeling of metal-on-metal hip resurfacing prosthesis

Abstract

ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. It is important to study the lubrication mechanism of metal-on-metal (MOM) hip resurfacing 2 prosthesis in order to understand its overall tribological performance, thereby minimize the 3 wear particles. Previous elastohydrodynamic lubrication (EHL) studies of MOM hip 4 resurfacing prosthesis neglected the effects of the orientations of the cup and head. Simplified 5 pelvic and femoral bone models were also adopted for the previous studies.

Predictive wear modeling of the articulating metal-on-metal hip replacements

“…A significant amount of research has been undertaken on the EHL of artificial hip joints . In these models, the interaction of the fluid film pressure and the elastically deformable head and cup is calculated to predict both the film thickness and the lubricating fluid pressure.…”

“…A significant amount of research has been undertaken on the EHL of artificial hip joints. [1][2][3][4][5][6][7][8][9][10][11][12][13] In these models, the interaction of the fluid film pressure and the elastically deformable head and cup is calculated to predict both the film thickness and the lubricating fluid pressure. Such studies have shown that the fluid-filled lubricating gap is at nanometer size-an extremely small gap when compared to typical engineering bearing problems, where the fluid-filled gap is typically in a range of 1-100 mm.…”