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Effect of random variation of input and various daily activities on wear in a hip joint simulator

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Viitala, Raine
dc.contributor.author Saikko, Vesa
dc.date.accessioned 2020-06-01T06:55:49Z
dc.date.available 2020-06-01T06:55:49Z
dc.date.issued 2020-06-09
dc.identifier.citation Viitala , R & Saikko , V 2020 , ' Effect of random variation of input and various daily activities on wear in a hip joint simulator ' , Journal of Biomechanics , vol. 106 , 109831 . https://doi.org/10.1016/j.jbiomech.2020.109831 en
dc.identifier.issn 0021-9290
dc.identifier.issn 1873-2380
dc.identifier.other PURE UUID: dadb588c-4039-41da-9748-ccda9fa017a1
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/dadb588c-4039-41da-9748-ccda9fa017a1
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85084583855&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/43150520/ENG_Viitala_et_al_Effect_of_random_Journal_of_Biomechanics.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/44558
dc.description.abstract The ISO 14242-1 standard specifies fixed, simplified, sinusoidal motion and double-peak load cycles for wear testing of total hip prostheses. In order to make the wear simulation more realistic, random variation was added for the first time to the motion and load control signals of a hip joint simulator. For this purpose and for the simulation of various daily activities, computer-controlled, servo-electric drives were mounted on a biaxial hip simulator frame and successfully introduced. Random variation did not result in a statistically significant difference in the wear factor of large diameter VEXLPE liners compared with fixed sinusoidal waveforms. However, level walking according to biomechanical literature surprisingly resulted in a 134 per cent higher, and jogging in a 57 per cent lower wear factor compared with the fixed sinusoidal waveforms. These wear phenomena were likely to be caused by a variation in the lubrication conditions and frictional heating. Simplified motion waveforms may result in an underestimation of wear in walking. en
dc.format.extent 7
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Elsevier Limited
dc.relation.ispartofseries Journal of Biomechanics en
dc.relation.ispartofseries Volume 106 en
dc.rights openAccess en
dc.title Effect of random variation of input and various daily activities on wear in a hip joint simulator en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Mechanical Engineering
dc.subject.keyword Computer-controlled hip simulator
dc.subject.keyword Extensively cross-linked UHMWPE
dc.subject.keyword Orthopedic biomechanics
dc.subject.keyword Servo-drive
dc.subject.keyword Wear of artificial joints
dc.identifier.urn URN:NBN:fi:aalto-202006013531
dc.identifier.doi 10.1016/j.jbiomech.2020.109831
dc.date.embargo info:eu-repo/date/embargoEnd/2021-06-09

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