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dc.contributor.authorNysted, Mona Iren
dc.contributor.authorBenum, Pål
dc.contributor.authorKlaksvik, Jomar
dc.contributor.authorFoss, Olav
dc.contributor.authorAamodt, Arild
dc.date.accessioned2019-10-11T11:31:05Z
dc.date.available2019-10-11T11:31:05Z
dc.date.created2011-10-28T13:06:41Z
dc.date.issued2011
dc.identifier.citationActa Orthopaedica. 2011, 82 (4), 410-416.nb_NO
dc.identifier.issn1745-3674
dc.identifier.urihttp://hdl.handle.net/11250/2621605
dc.description.abstractBackground and purpose Customized femoral stems are designed to have a perfect fit and fill in the femur in order to achieve physiological load transfer and minimize stress shielding. Dual-energy X-ray absorptiometry (DXA) is regarded as an accurate method for detection of small alterations in bone mineral density (BMD) around hip prostheses. We present medium-term DXA results from a randomized study comparing a customized and an anatomical femoral stem. Methods 100 hips were randomized to receive either the anatomical ABG-I stem or the Unique customized femoral stem, both uncemented. DXA measurements were conducted postoperatively and after 3, 6, 12, 24, 36, and 60 months, and BMD was computed for each of the 7 Gruen zones in the proximal femur. Results Results from 87 patients were available for analysis. 78 completed the 5-year follow-up: 35 patients in the ABG group and 43 patients in the Unique group. In both groups, we found the greatest degree of bone loss in the proximal Gruen zones. In zone 1, there was 15% reduction in BMD in the ABG-I group and 14% reduction in the Unique group. In zone 7, the reduction was 28% in the ABG-I group and 27% in the Unique group. The only statistically significant difference between the groups was found in Gruen zone 4, which is distal to the tip of the stem, with 1.6% reduction in BMD in the ABG-I group and 9.7% reduction in the Unique group (p = 0.003). Interpretation 5-year DXA results showed that because of stress-shielding, proximal bone loss could not be avoided—either for the anatomical ABG-I stem or for the customized Unique stem.nb_NO
dc.language.isoengnb_NO
dc.publisherTaylor & Francisnb_NO
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/deed.no*
dc.titlePeriprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem A randomized DXA study with 5-year follow-upnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber410-416nb_NO
dc.source.volume82nb_NO
dc.source.journalActa Orthopaedicanb_NO
dc.source.issue4nb_NO
dc.identifier.doi10.3109/17453674.2011.588860
dc.identifier.cristin848734
dc.description.localcodeOpen Access - This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.nb_NO
cristin.unitcode1920,9,0,0
cristin.unitcode194,65,30,0
cristin.unitnameKlinikk for ortopedi, revmatologi og hudsykdommer
cristin.unitnameInstitutt for nevromedisin og bevegelsesvitenskap
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse-Ikkekommersiell 4.0 Internasjonal
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