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Uncemented or cemented revision stems?: Analysis of 2,296 first-time hip revision arthroplasties performed due to aseptic loosening, reported to the Swedish Hip Arthroplasty Register
Uppsala Univ Hosp, Dept Surg Sci, Sect Orthoped Surg, Uppsala, Sweden;Swedish Hip Arthroplasty Register, Gothenburg, Sweden.
Swedish Hip Arthroplasty Register, Gothenburg, Sweden;Sahlgrens Univ Hosp, Sahlgrenska Acad, Inst Clin Sci, Dept Orthoped, Molndal, Sweden.
Swedish Hip Arthroplasty Register, Gothenburg, Sweden;Sahlgrens Univ Hosp, Sahlgrenska Acad, Inst Clin Sci, Dept Orthoped, Molndal, Sweden.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Orthopaedics.ORCID iD: 0000-0002-3233-2638
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2019 (English)In: Acta Orthopaedica, ISSN 1745-3674, E-ISSN 1745-3682, Vol. 90, no 5, p. 421-426Article in journal (Refereed) Published
Abstract [en]

Background and purpose - Uncemented stems are increasingly used in revision hip arthroplasty, but only a few studies have analyzed the outcomes of uncemented and cemented revision stems in large cohorts of patients. We compared the results of uncemented and cemented revision stems. Patients and methods - 1,668 uncemented and 1,328 cemented revision stems used in first-time revisions due to aseptic loosening between 1999 and 2016 were identified in the Swedish Hip Arthroplasty Register. Kaplan-Meier analysis was used to investigate unadjusted implant survival with re-revision for any reason as the primary outcome. Hazard ratios (HR) for the risk of re-revision were calculated using a Cox regression model adjusted for sex, age, head size, concomitant cup revision, surgical approach at primary and at index revision surgery, and indication for primary total hip arthroplasty. Results - Unadjusted 10-year survival was 85% (95% CI 83-87) for uncemented and 88% (CI 86-90) for cemented revision stems. The adjusted HR for re-revision of uncemented revision stems during the first year after surgery was 1.3 (CI 1.0-1.6), from the second year the HR was 1.1 (CI 0.8-1.4). Uncemented stems were most often re-revised early due to infection and dislocation, whereas cemented stems were mostly re-revised later due to aseptic loosening. Interpretation - Both uncemented and cemented revision stems had satisfactory long-term survival but they differed in their modes of failure. Our conclusions are limited by the fact that femoral bone defect size could not be investigated within the setting of the current study.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2019. Vol. 90, no 5, p. 421-426
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Orthopaedics
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URN: urn:nbn:se:uu:diva-395320DOI: 10.1080/17453674.2019.1624336ISI: 000486111700002PubMedID: 31154890OAI: oai:DiVA.org:uu-395320DiVA, id: diva2:1362137
Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-18Bibliographically approved

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