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dc.contributor.authorEnoksen, Cathrine Harstad
dc.contributor.authorWik, Tina Strømdal
dc.contributor.authorKlaksvik, Jomar
dc.contributor.authorArthursson, Asvaldur
dc.contributor.authorHusby, Otto Schnell
dc.contributor.authorGjerdet, Nils Roar
dc.date.accessioned2018-03-21T12:42:14Z
dc.date.available2018-03-21T12:42:14Z
dc.date.created2017-11-24T10:50:05Z
dc.date.issued2017
dc.identifier.citationProceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine. 2017, 231 (12), 1195-1203.nb_NO
dc.identifier.issn0954-4119
dc.identifier.urihttp://hdl.handle.net/11250/2491502
dc.description.abstractThere are principally two fixation methods in total hip arthroplasty, cemented and uncemented. Both methods have in general good long-time survival. Studies comparing cemented and uncemented femoral stems indicate that the cemented stems perform somewhat better, at least in the elderly population. The aim of this study was to compare load transfer and the initial micromotion pattern for an uncemented and a cemented stem. A total of 12 human cadavers were tested in a hip simulator during single leg and stair climbing. Strain was measured on the proximal femur before and after implantation of the prostheses, and the values were presented as percentage of physiological strain. The micromovements between the stem and bone were measured and a total point motion was calculated. The results showed small statistically significant differences between the fixation methods, the largest difference being 8.1 percentage points. The uncemented stem had somewhat higher micromotion than the cemented stem, but less than 10 µm. Both stems thus had acceptable primary stability. The main finding of this study is the strain and micromotion pattern of a cemented and an uncemented stem of similar geometry is overall equal. There were small statistical significant differences between the two fixation methods regarding strain and micromotion levels. The differences are considered too small to be clinically relevant.nb_NO
dc.language.isoengnb_NO
dc.publisherSAGE Publicationsnb_NO
dc.titleLoad transfer in the proximal femur and primary stability of a cemented and uncemented femoral stem: An experimental study on cadaver femursnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber1195-1203nb_NO
dc.source.volume231nb_NO
dc.source.journalProceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicinenb_NO
dc.source.issue12nb_NO
dc.identifier.doi10.1177/0954411917737804
dc.identifier.cristin1518054
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2017 by SAGE Publicationsnb_NO
cristin.unitcode194,65,30,0
cristin.unitnameInstitutt for nevromedisin og bevegelsesvitenskap
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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