Bone mineral density of the proximal femur after hip resurfacing arthroplasty: 1-year follow-up study

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Show simple item record Häkkinen, Arja Borg, Håkan Hakulinen, Mikko Jurvelin, Jukka Anttila, Esa Parviainen, Tapani Kiviranta, Ilkka 2012-11-19T07:30:22Z 2012-11-19T07:30:22Z 2011
dc.identifier.citation Häkkinen, A., Borg, H., Hakulinen, M., Jurvelin, J., Anttila, E., Tapani, P., & Kiviranta, I. (2011). Bone mineral density of the proximal femur after hip resurfacing arthroplasty: 1-year follow-up study. BMC Musculoskeletal Disorders, 12 (May 19), 100. doi:doi:10.1186/1471-2474-12-100 Retrieved from
dc.identifier.issn 1471-2474
dc.description.abstract Abstract Background Hip resurfacing arthroplasty (HRA) is considered a bone-preserving procedure and may eliminate proximal femoral stress shielding and osteolysis. However, in addition to implant-related stress-shielding factors, various patient-related factors may also have an effect on bone mineral density (BMD) of the proximal femur in patients with HRA. Thus, we studied the effects of stem-neck angle, demographic variables, and physical functioning on the BMD of the proximal femur in a one-year follow-up. Methods Thirty three patients (9 females and 24 males) with a mean (SD) age of 55 (9) years were included in the study. BMD was measured two days and 3, 6, and 12 months postoperatively and 10 regions of interest (ROI) were used. Stem-neck angle was analyzed from anteroposterior radiographs. Results Three months postoperatively, BMD decreased in six out of 10 regions of interest (ROI) on the side operated on and in one ROI on the control side (p < 0.05) compared to the second postoperative day. At 12 months, BMD had increased in 7 ROIs on the operated side and one ROI on the control side (all p < 0.001). Correlation was found between the stem-neck angle and BMD in ROIs 2, 3, 7, and 9 (r = 0.36 - 0.61). In multiple regression analysis, stem-neck angle, age, sex, body mass index, and walking distance did not explain the BMD changes. Conclusions After an early drop, the BMD of the upper femur was restored and even exceeded the preoperative level at one year follow-up. From a clinical standpoint, the changes in BMD in these HRA patients could not be explained by stem-neck angle or patient related factors.
dc.language.iso eng
dc.publisher BioMed Central (BMC)
dc.relation.ispartofseries BMC Musculoskeletal Disorders
dc.rights openAccess fi
dc.rights © 2011 Häkkinen et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.subject.other bone mineral density en
dc.subject.other surgery en
dc.subject.other luuntiheys fi
dc.subject.other lonkan pinnoiteleikkaus fi
dc.title Bone mineral density of the proximal femur after hip resurfacing arthroplasty: 1-year follow-up study
dc.type Article
dc.contributor.laitos Terveystieteiden laitos fi
dc.contributor.laitos Department of Health Sciences en
dc.identifier.doi 10.1186/1471-2474-12-100 2012-11-15T14:50:22Z
dc.description.version Publisher's PDF
dc.rights.holder Arja Häkkinen et al.; licensee BioMed Central Ltd.
dc.type.coar journal article
dc.description.reviewStatus peerReviewed
dc.relation.issn 1471-2474
dc.type.version publishedVersion
dc.rights.accessLevel openAccess

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