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ISSN Печать: 1050-6934
ISSN Онлайн: 1940-4379
Indexed in
Failure of Cemented Constrained Acetabular Component at the Bipolar Outer Femoral Head Interface in Revision Hip Arthroplasty
Краткое описание
Constrained acetabular components are used as a salvage option for unstable total hip arthroplasties particularly in elderly low demand patients. Their indications include multiple failed revisions with abductor deficiency, neurologic or neuromuscular impairment, recurrent dislocations where the cause of instability cannot be identified despite well-aligned components. Failure of these components occurred due to increased forces across the bone-component interface or failure of the locking mechanisms. We report a unique mode of failure of a constrained cup through dissociation of the outer femoral bipolar femoral head interface in all-poly cemented constrained components 5-years post implantation with a review of the relevant literature.
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Goetz DD, Bremner BR, Callaghan JJ, Capello WN, Johnston RC., Salvage of a recurrently dislocating total hip prosthesis with use of a constrained acetabular component. A concise follow-up of a previous report. J Bone Joint Surg Am Vol. 2004;86-a(11):2419–23.
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McCarthy JC, Lee JA. , Constrained acetabular components in complex revision total hip arthroplasty. Clin Ortho Related Res. 2005;441:210–15.
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Guyen O, Lewallen DG, Cabanela ME., Modes of failure of Osteonics constrained tripolar implants: a retrospective analysis of forty-three failed implants. J Bone Joint Surg Am Vol. 2008;90(7):1553–60.