TY - GEN
T1 - A study of wear characteristics of superpolished orthopaedic implant materials using ultra-precision polishing
AU - Cheung, Chi Fai
AU - Lee, Wing Bun
AU - Charlton, P.
AU - To, Suet
PY - 2010/12/29
Y1 - 2010/12/29
N2 - 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.
AB - 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.
KW - Biomedical
KW - Orthopaedic implants
KW - Pin-on-Plate wear testing
KW - Superpolishing
KW - Ultra-precision machining
KW - Ultra-precision polishing
KW - Wear characteristics
UR - http://www.scopus.com/inward/record.url?scp=78650425708&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.447-448.111
DO - 10.4028/www.scientific.net/KEM.447-448.111
M3 - Conference article published in proceeding or book
SN - 9780878492565
T3 - Key Engineering Materials
SP - 111
EP - 115
BT - Advances in Precision Engineering
T2 - ICoPE2010 and 13th ICPE International Conference on Precision Engineering
Y2 - 28 July 2010 through 30 July 2010
ER -