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17-05-2024 | Original Article

Mid-term clinical radiological results of the constrained condylar knee prosthesis in total knee revision

Authors: Iñigo Bidea, Xabier Foruria, Isidoro Calvo, Jesús Moreta, Jon Zabala, Rodrigo González

Published in: European Journal of Orthopaedic Surgery & Traumatology | Issue 5/2024

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Abstract

Introduction

The aim of the present study is to analyze the clinical–radiological outcomes of patients undergoing knee prosthesis revision surgery using constrained condylar prosthesis (LCCK; Zimmer-Biomet).

Material and methods

Retrospective study of 89 patients operated on between the years 2008 and 2020 with a minimum of 2 years of follow-up. Clinical outcomes were evaluated using the WOMAC Index score and KOOS scales. Radiological results (radiolucent lines, osteolysis, and cortical hypertrophy) were evaluated by two independent observers. Implant survival was analyzed using the Kaplan–Meier method.

Results

At the end of follow-up, a mean WOMAC Index score of 78.67 and KOOS score of 68.8 were obtained. Radiolucent lines (both non-progressive and progressive) were detected in 83.3% of the patients in the sample. Areas of osteolysis > 5 mm around the components were present in 6.75%. Cortical hypertrophy was seen around the femoral stem in 20.3% of cases, around the tibial stem in 20.3% and around both components in 6.76%. No statistically significant relationship was found between the presence of radiolucent lines, osteolysis or cortical hypertrophy with functional results. Implant survival was 88.1% at 13 years.

Conclusion

The present study shows high survival of LCCK prosthesis in revision surgery. The progressive radiolucencies, were associated with worst clinical outcome.
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Metadata
Title
Mid-term clinical radiological results of the constrained condylar knee prosthesis in total knee revision
Authors
Iñigo Bidea
Xabier Foruria
Isidoro Calvo
Jesús Moreta
Jon Zabala
Rodrigo González
Publication date
17-05-2024
Publisher
Springer Paris
Published in
European Journal of Orthopaedic Surgery & Traumatology / Issue 5/2024
Print ISSN: 1633-8065
Electronic ISSN: 1432-1068
DOI
https://doi.org/10.1007/s00590-024-03977-9

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