Institution: The University of Leeds
Investigators: Professor John Fisher, Dr Louise Jennings, Dr Alison Galvin
Stream: Research Fellowship
Topic: Tribology (Hip)
Status: Live
Metal-on-Metal (MoM) bearings have been widely used on young and active patients in recent years. The aims of this project are to investigate wear, wear debris and ion levels in MoM and ceramic-on-ceramic (CoC) hard on hard bearing couples under adverse conditions of steep cup angle and head/cup rim contact in hip joint simulators. Also to determine the benefit of larger head sizes and ceramic matrix composite materials under these more severe wear conditions and compare to clinical retrievals.
In addition to investigations of the effect of steep cup angle, microseparation and offset deficiency and head diameter, on hard on hard bearings, which were planned in the original study, these more recent reports indicate that other parameters, such as cup design (included angle), rim geometry, version and metallurgy may also be significant factors influencing wear, and the feasibility of considering additional variables within the test matrix is being considered.
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