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

6533b7d5fe1ef96bd126493f

RESEARCH PRODUCT

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

Håkan Borg Ilkka Kiviranta Jukka S. Jurvelin Tapani Parviainen Esa Anttila Mikko Hakulinen Arja Häkkinen

subject

Male Time Factors lcsh:Diseases of the musculoskeletal system Bone density Arthroplasty Replacement Hip medicine.medical_treatment dual energy X-ray absorptiometry 02 engineering and technology Severity of Illness Index Osteoarthritis Hip Absorptiometry Photon 0302 clinical medicine Bone Density Orthopedics and Sports Medicine Femur Prospective Studies Finland stress shielding 2. Zero hunger Bone mineral 030222 orthopedics medicine.diagnostic_test stem-neck angle Middle Aged Stress shielding Hip resurfacing REPLACEMENT Treatment Outcome medicine.anatomical_structure Female Research Article bone remodeling dual energy X-ray absorptiometry musculoskeletal diseases medicine.medical_specialty education 0206 medical engineering 03 medical and health sciences Femoral head POSTERIOR APPROACH Rheumatology medicine Humans Femur PRESERVATION bone remodeling NECK Dual-energy X-ray absorptiometry business.industry 3126 Surgery anesthesiology intensive care radiology 020601 biomedical engineering Arthroplasty Surgery Logistic Models 5-YEAR MODES ABSORPTIOMETRY FEMORAL-HEAD lcsh:RC925-935 business Nuclear medicine Follow-Up Studies

description

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 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.

year	journal	country	edition	language
2011-05-01	BMC Musculoskeletal Disorders

10.1186/1471-2474-12-100 http://dx.doi.org/10.1186/1471-2474-12-100