The effect of polyethylene thickness in fixed- and mobile-bearing total knee replacements

Shi, J F, Wang, C J, Berryman, F and Hart, W (2008) The effect of polyethylene thickness in fixed- and mobile-bearing total knee replacements. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 222 (5). pp. 657-667. ISSN 0954-4119

Full text not available from this repository.


In this paper fixed- and mobile-bearing implants were simulated using a multibody dynamic model and a finite element model to investigate the contact pressure distribution in the ultra high molecular weight polyethylene tibial bearing component. The thickness of polyethylene varied from 6.8 to 12.3 mm and the polyethylene was modelled as a non-linear material. It was found that the contact pressure on the polyethylene decreased in the fixed-bearing implant when the thickness of polyethylene increased from 6.8 to 8 and 9.6 mm, but there was little further decrease in pressure with the increase of polyethylene thickness from 9.6 to 11.0 and 12.3 mm. In the mobile-bearing implant, no increase in contact pressure on the superior surface was found with the increase in the thickness of the polyethylene; however, the contact pressures on the inferior contact surface of the thicker designs were higher than those in the 6.8 mm design. The numerical results obtained in this paper are in good agreement with published experimental test results. Moreover, the paper presents a detailed pressure distribution on the tibial bearing component during a full gait cycle.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Depositing User: Chang Wang
Date Deposited: 03 Oct 2013 14:47
Last Modified: 03 Oct 2013 14:47
📧 Request an update