Demonstration of a new technique using radioisotope tracers to measure the backside wear rate on tibial inserts

Jacob Warner, Laura Gladkis, Paul Smith, Jennie Scarvell, Heiko Timmers

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Local backside wear measurements on ultrahigh molecular weight polyethylene (UHMWPE) tibial inserts in LCS mobile bearing knee prostheses have been performed using a new radioisotope tracing technique. The radioisotope tracers 97Ru and 101mRh were synthesized via a fusion evaporation reaction and recoilimplanted into cylindrical plugs of UHMWPE. The labelled plugs were carefully fitted into tibial inserts at two relevant locations. With bovine serum acting as a lubricant, the tibial inserts were then worn in vitro for 500,000 and 780,000 cycles, respectively, in a pneumatic knee motion simulator. Results reflect the non-linear change of wear during the wear-in phase and its evolution to a long-term steady-state rate. This new technique shows potential for extracting localized wear rates across the backside of a tibial insert in order to develop a comprehensive backside wear model. © Springer Science+Business Media,
Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalTribology Letters
Volume46
Issue number2
DOIs
Publication statusPublished - 2012

Fingerprint

Radioactive tracers
inserts
Radioisotopes
tracers
Demonstrations
Wear of materials
Ultrahigh molecular weight polyethylenes
plugs
polyethylenes
molecular weight
Bearings (structural)
motion simulators
Knee prostheses
Die casting inserts
pneumatics
lubricants
tracing
serums
Pneumatics
Lubricants

Cite this

Warner, Jacob ; Gladkis, Laura ; Smith, Paul ; Scarvell, Jennie ; Timmers, Heiko. / Demonstration of a new technique using radioisotope tracers to measure the backside wear rate on tibial inserts. In: Tribology Letters. 2012 ; Vol. 46, No. 2. pp. 139-145.
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Demonstration of a new technique using radioisotope tracers to measure the backside wear rate on tibial inserts. / Warner, Jacob; Gladkis, Laura; Smith, Paul; Scarvell, Jennie; Timmers, Heiko.

In: Tribology Letters, Vol. 46, No. 2, 2012, p. 139-145.

Research output: Contribution to journalArticle

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AU - Warner, Jacob

AU - Gladkis, Laura

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AU - Timmers, Heiko

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AB - Local backside wear measurements on ultrahigh molecular weight polyethylene (UHMWPE) tibial inserts in LCS mobile bearing knee prostheses have been performed using a new radioisotope tracing technique. The radioisotope tracers 97Ru and 101mRh were synthesized via a fusion evaporation reaction and recoilimplanted into cylindrical plugs of UHMWPE. The labelled plugs were carefully fitted into tibial inserts at two relevant locations. With bovine serum acting as a lubricant, the tibial inserts were then worn in vitro for 500,000 and 780,000 cycles, respectively, in a pneumatic knee motion simulator. Results reflect the non-linear change of wear during the wear-in phase and its evolution to a long-term steady-state rate. This new technique shows potential for extracting localized wear rates across the backside of a tibial insert in order to develop a comprehensive backside wear model. © Springer Science+Business Media,

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