Demonstration of a New Technique Using Radioisotope Tracers to Measure the Backside Wear Rate on Tibial Inserts
| Autor: | Paul N. Smith, Jennifer M. Scarvell, Heiko Timmers, Jacob A. Warner, Laura G. Gladkis |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Mechanical Engineering Surfaces and Interfaces Polyethylene musculoskeletal system Surfaces Coatings and Films Abrasion (geology) chemistry.chemical_compound chemistry Mechanics of Materials Forensic engineering Mobile bearing Tibial insert Lubricant Wear measurement Biomedical engineering |
| Zdroj: | Tribology Letters. 46:139-145 |
| ISSN: | 1573-2711 1023-8883 |
| DOI: | 10.1007/s11249-012-9933-8 |
| Popis: | Local backside wear measurements on ultra-high 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 recoil-implanted 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. |
| Databáze: | OpenAIRE |
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