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    Dual energy X-ray absorptiometry analysis of peri-prosthetic stress shielding in the Birmingham resurfacing hip replacement.

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    Authors
    Harty, J A
    Devitt, B
    Harty, L C
    Molloy, M
    McGuinness, A
    Affiliation
    Department of Orthopaedic Surgery, Cork University Hospital, The Mews, 61, Serpentine Ave, Ballsbridge, Dublin 4, Ireland. jaharty@hotmail.com
    Issue Date
    2012-02-03T15:06:24Z
    MeSH
    *Absorptiometry, Photon
    Arthroplasty, Replacement, Hip/*instrumentation
    *Bone Density
    Femur Head/radiography
    Femur Neck/radiography
    *Hip Prosthesis
    Humans
    Middle Aged
    Orthopedic Procedures/*instrumentation
    Osteoarthritis, Hip/radiography/surgery
    Stress, Mechanical
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    Citation
    Arch Orthop Trauma Surg. 2005 Dec;125(10):693-5. Epub 2005 Oct 20.
    Journal
    Archives of orthopaedic and trauma surgery
    URI
    http://hdl.handle.net/10147/208883
    DOI
    10.1007/s00402-005-0059-4
    PubMed ID
    16237532
    Abstract
    INTRODUCTION: Numerous reports in the literature refer to the femoral neck fracture rate in hip resurfacing. The aim of this study was to determine the bone mineral density and evidence of stress shielding around the femoral component of the Birmingham resurfacing prosthesis. MATERIAL AND METHODS: Twenty-eight patients with primary unilateral osteoarthritis had a Birmingham resurfacing prosthesis. DEXA analysis of the proximal femur and femoral neck was performed and compared with the opposite unaffected side. RESULTS: Total periprosthetic bone mineral density was 0.49% greater than the control, but this did not achieve statistical significance. Although the BMD of the femoral neck was slightly increased on the prosthetic side (1.002 g/cm2) as opposed to the control side, this difference did not reach statistical significance. CONCLUSION: The Birmingham resurfacing prosthesis does not appear to reduce femoral neck bone mineral density in comparison to the normal femoral neck bone density. We conclude that femoral neck fractures are unlikely to be due to stress shielding related to the prosthesis.
    Language
    eng
    ISSN
    0936-8051 (Print)
    0936-8051 (Linking)
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00402-005-0059-4
    Scopus Count
    Collections
    Cork University Hospital

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