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Late stabilization after initial migration in patients undergoing cemented total knee arthroplasty : a 5-year followup of 2 randomized controlled trials using radiostereometric analysis
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- Hasan, Shaho (author)
- Leiden University Medical Centre
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- Kaptein, Bart L. (author)
- Leiden University Medical Centre
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- Marang-van de Mheen, Perla J. (author)
- Leiden University Medical Centre
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- Van Hamersveld, Koen T. (author)
- Leiden University Medical Centre
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- Nelissen, Rob G.H.H. (author)
- Leiden University Medical Centre
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- Toksvig-Larsen, Sören (author)
- Lund University,Lunds universitet,Ortopedi, Lund,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Orthopaedics (Lund),Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Hässleholm hospital
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(creator_code:org_t)
- 2022-01-24
- 2022
- English 6 s.
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In: Acta Orthopaedica. - : Medical Journals Sweden AB. - 1745-3682 .- 1745-3674. ; 93, s. 271-276
- Related links:
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http://dx.doi.org/10... (free)
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https://actaorthop.o...
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https://lup.lub.lu.s...
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https://doi.org/10.2...
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Abstract
Subject headings
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- BACKGROUND AND PURPOSE: In total knee arthroplasty (TKA), metal-backed (MBT) and all-polyethylene (APT) designs have shown comparable implant migration up to 2 years postoperatively using radiostereometric analysis (RSA). However, studies comparing mid-term migration of both designs are lacking. Furthermore, continuously migrating TKAs up to 2 years may continue to migrate or stabilize thereafter. Therefore, we compared 5-year migration of MBT and APT using either cruciate-stabilizing (CS) or posteriorstabilizing (PS) designs and specifically assessed migration profiles of continuously migrating TKAs beyond 2 years. PATIENTS AND METHODS: The present study includes results from 2 randomized trials comparing migration of cemented MBT with APT of either CS (CS study, n = 59) or PS (PS study, n = 56) design. 2 surgeons performed all surgeries. We used a linear mixed model for the analyses. RESULTS: The overall migration between MBT and APT TKAs was similar for either the CS or PS design over a 5-year period. In both studies combined, 9 implants showed continuous migration in the second postoperative year, of which 1 (APT-CS) was revised for instability, 4 (2 MBT-CS, MBT-PS, APT-PS) stabilized, and 4 (2 MBT-CS, APT-CS, MBT-PS) lacked 5-year data. INTERPRETATION: Overall migration was similar between MBT and APT TKAs up to 5 years, for both the CS and PS design. 4 initially migrating TKAs stabilized between 2- and 5-year follow-up, stressing the need for longer-term followup to determine whether second-year continuous migration correctly predicts loosening.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Ortopedi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Orthopaedics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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