The effect of different lubrication regimes and lubricants on the friction hard-on-hard total hip replacements

  • Sophie Williams
  • , Zhongmin M. Jin
  • , Martin H. Stone
  • , Eileen Ingham
  • , John Fisher

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The wear of hip replacements can be dependent on serum protein levels and the swing-phase load during the gait cycle. We hypothesise that these effects may be associated with changes in the lubrication and friction of the joint. The aim of this study was to assess the effect of the lubrication regime and lubricant on the friction of metal-on-metal (MOM) and ceramic-on-ceramic (COC) THRs. Increasing the swing-phase load led to decreased fluid film thickness and an increase in friction, in both MOM and COC bearings. Increasing the protein concentration of the lubricant, decreased the friction of MOM THRs. Friction testing of COC bearings demonstrated an increase in friction as the protein concentration increased. The change in lubricating film thickness explains differences in friction and wear as the swing-phase load is changed for a given lubricant. However, when we change the lubricant composition, protein boundary lubrication effects dominate, this influences friction and wear differently in MOM and COC THRs.

Original languageEnglish
Title of host publicationProceedings of the World Tribology Congress III - 2005
PublisherAmerican Society of Mechanical Engineers
Pages625-626
Number of pages2
ISBN (Print)0791842029, 9780791842027
DOIs
StatePublished - 2005
Externally publishedYes
Event2005 World Tribology Congress III - Washington, D.C., United States
Duration: 12 Sep 200516 Sep 2005

Publication series

NameProceedings of the World Tribology Congress III - 2005

Conference

Conference2005 World Tribology Congress III
Country/TerritoryUnited States
CityWashington, D.C.
Period12/09/0516/09/05

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