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Effect of temperature on UHMWPE and VEXLPE friction and wear against CoCr in noncyclic tests

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Saikko, Vesa
dc.contributor.author Morad, Omar
dc.contributor.author Viitala, Raine
dc.date.accessioned 2022-03-15T12:38:00Z
dc.date.available 2022-03-15T12:38:00Z
dc.date.issued 2022-02-15
dc.identifier.citation Saikko , V , Morad , O & Viitala , R 2022 , ' Effect of temperature on UHMWPE and VEXLPE friction and wear against CoCr in noncyclic tests ' , Wear , vol. 490-491 , 204190 . https://doi.org/10.1016/j.wear.2021.204190 en
dc.identifier.issn 0043-1648
dc.identifier.issn 1873-2577
dc.identifier.other PURE UUID: b8032f52-0af1-4848-a877-4c3508d8da98
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/b8032f52-0af1-4848-a877-4c3508d8da98
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85120832588&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/80168282/1_s2.0_S0043164821005731_main.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/113361
dc.description Funding Information: The study was funded by Aalto University . This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Publisher Copyright: © 2021 The Authors
dc.description.abstract In prosthetic joints, frictional heating may cause protein denaturation in synovial fluid which may affect its lubrication properties. In arthroplasty, conventional ultra-high molecular weight polyethylene (UHMWPE) is being gradually replaced by vitamin E stabilized, extensively cross-linked UHMWPE (VEXLPE) with a superior combination of wear and oxidation resistance. There is scarcity of literature on UHMWPE vs.VEXLPE friction. A noncyclic, single-station friction measurement device, the Friction RandomPOD, was recently introduced. The direction of sliding, velocity, acceleration, and load varied randomly within certain, biomechanically justified limits. The measurement of the coefficient of friction was based on a three-axial load cell. In order to increase the testing capacity, the number of test stations was now increased to 4 using similar load cells. One-week tests were performed with pins made of UHMWPE and VEXLPE against CoCr in calf serum lubrication at 4 °C, 20 °C and 37 °C. The lower temperatures were included to prevent or retard protein denaturation. The lowest friction and wear were observed at 37 °C. At this temperature, the mean of the coefficient of friction of VEXLPE was 55% lower than that of UHMWPE. The wear of VEXLPE was always lower than that of UHMWPE. en
dc.format.extent 5
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Elsevier BV
dc.relation.ispartofseries Wear en
dc.relation.ispartofseries Volume 490-491 en
dc.rights openAccess en
dc.title Effect of temperature on UHMWPE and VEXLPE friction and wear against CoCr in noncyclic tests en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Mechatronics
dc.contributor.department Department of Mechanical Engineering en
dc.subject.keyword Dynamic friction measurement
dc.subject.keyword Noncyclic pin-on-disk
dc.subject.keyword Orthopaedic tribology
dc.subject.keyword Servo-drive
dc.subject.keyword Vitamin E stabilized, extensively cross-linked UHMWPE
dc.identifier.urn URN:NBN:fi:aalto-202203152240
dc.identifier.doi 10.1016/j.wear.2021.204190
dc.type.version publishedVersion


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