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Uncemented cups wit...
Uncemented cups with and without screw holes in primary THA : a Swedish Hip Arthroplasty Register study with 22725 hips
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- Otten, Volker T C (author)
- Umeå universitet,Ortopedi
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- Mukka, Sebastian (author)
- Umeå universitet,Institutionen för kirurgisk och perioperativ vetenskap
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- Nilsson, Kjell G (author)
- Umeå universitet,Ortopedi
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- Crnalic, Sead (author)
- Umeå universitet,Ortopedi
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Kärrholm, Johan (author)
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Background and purpose: Uncemented cups in total hip arthroplasty (THA) are often augmented with additional screws to enhance their primary stability. We investigated whether there is a difference in the risk for revision between cups with screw holes and cups without screw holes.Patients and methods: We analyzed the risk for cup revision of uncemented cups registered in the Swedish Hip Arthroplasty Register (SHAR) between 2000 and 2017 with respect to the presence of screw holes. Only patients with primary osteoarthritis (OA) were included. 22725 cups, including 12354 without screw holes and 10371 with screw holes, were evaluated. Revision rates at 2 and 10 years after the primary operation were analyzed.Results: At a median follow-up time of 3.4 (0-18) years, 459 cup revisions were reported. The main reasons for cup revision during the whole observations time were infection, 52% of all cup revisions, and dislocation, 26% of all cup revisions. The survival rate with cup revision due to aseptic loosening as endpoint was 99.9% (95% CI 99.8-99.9) at 2 years for both cups with and cups without screw holes, and the survival rates at 10 years were 99.5% (CI 99.3-99.7) and 99.1% (CI 98.6-99.5), respectively. Cups without screw holes showed a decreased risk of revision due to any reason at both 2 years (adjusted hazard ratio [HR] 0.6, CI 0.5-0.8) and 10 years (HR 0.7, CI 0.5-0.9).Interpretation: We found a very low revision rate for aseptic loosening with modern, uncemented cup designs. Cups with screw holes had an increased risk for revision due to any reason in patients with primary OA.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Ortopedi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Orthopaedics (hsv//eng)
Keyword
- Total Hip Arthroplasty
- uncemented
- cup
- revision
- registry
- ortopedi
- Orthopaedics
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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