A study of wear characteristics of superpolished orthopaedic implant materials using ultra-precision polishing

Chi Fai Cheung, Wing Bun Lee, P. Charlton, Suet To

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Ultra-precision polishing is an emerging technology for producing superfinishing surfaces with sub-micrometer form accuracy and surface finish in nanometer range. It has been applied in superpolishing the freeform bearing surfaces of orthopaedic implants. It is believe that the superfished surfaces are capable of prolonging the life of the implants. In this paper, an experimental investigation of ultra-precision polishing of orthopaedic implants and the study of the wear characteristics of the superfinished surfaces using a multi-directional pin-on-plate wear test simulator have been conducted. Tests were carried out over 3 million cycles using Zeeko IRP200 superfinished cobalt chrome pins articulating against cross-linked UHMWPE plates. The results were compared to that of manually polished pins articulated against the same UHMWPE material. The results show that the Zeeko IRP200 polished pins produced better wear performance that that of the manually polished pins.
Original languageEnglish
Title of host publicationAdvances in Precision Engineering
Pages111-115
Number of pages5
DOIs
Publication statusPublished - 29 Dec 2010
EventICoPE2010 and 13th ICPE International Conference on Precision Engineering - , Singapore
Duration: 28 Jul 201030 Jul 2010

Publication series

NameKey Engineering Materials
Volume447 448
ISSN (Print)1013-9826

Conference

ConferenceICoPE2010 and 13th ICPE International Conference on Precision Engineering
CountrySingapore
Period28/07/1030/07/10

Keywords

  • Biomedical
  • Orthopaedic implants
  • Pin-on-Plate wear testing
  • Superpolishing
  • Ultra-precision machining
  • Ultra-precision polishing
  • Wear characteristics

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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