Gao, Y, Chai, W, Wang, L et al. (2 more authors) (2016) Effect of friction and clearance on kinematics and contact mechanics of dual mobility hip implant. Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine, 230 (1). pp. 39-49. ISSN 0954-4119
Abstract
The dual mobility hip implant has been introduced recently and increasingly used in total hip replacement to maintain the stability and reduce the risk of post-surgery dislocation. However, the kinematics and contact mechanisms of dual mobility hip implants have not been investigated in detail in the literature. Therefore, finite element method was adopted in this study to investigate dynamics and contact mechanics of a typical metal-on-polymer dual mobility hip implant under different friction coefficient ratios between the inner and the outer articulations and clearances/interferences between the ultra-high-molecular-weight polyethylene liner and the metal back shell. A critical ratio of friction coefficients between the two pairs of contact interfaces was found to mainly determine the rotating surfaces. Furthermore, an initial clearance between the liner and the back shell facilitated the rotation of the liner while an initial interference prevented such a motion at the outer articulating interface. In addition, the contact area and the sliding distance at the outer articulating surface were markedly greater than those at the inner cup-head interface, potentially leading to extensive wear at the outer surface of the liner.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) IMechE 2015. This is an author produced version of a paper published in Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Dual mobility hip implant, contact mechanics, dynamics, friction coefficient, clearance/interference |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Dec 2015 11:48 |
Last Modified: | 19 Jan 2018 05:21 |
Published Version: | http://dx.doi.org/10.1177/0954411915617198 |
Status: | Published |
Publisher: | SAGE Publications |
Identification Number: | 10.1177/0954411915617198 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92787 |