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Functional comparison of total knee arthroplasty performed with and without a navigation system

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Abstract

This study was undertaken to compare the clinical and radiological outcomes achieved using total knee arthroplasty (TKA) with and without a navigation system. This study included 43 TKAs performed with a navigation system and 42 TKAs without a navigation system with a minimum two-year follow-up. We compared clinical outcomes including range of motion, Hospital for Special Surgery (HSS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores at the final follow-up. For radiological comparisons, we evaluated radiological alignment on standing radiographs of knees. HSS and WOMAC scores showed significant improvements at final follow-ups in both groups, but showed no significant inter-group differences (p > 0.05). Similarly, no significant differences were observed in range of motion (p = 0.962). TKAs performed with navigation showed significantly better outcomes in terms of mechanical angle and prosthetic alignment outliers than TKAs performed without navigation. However, we could not find any differences in functional outcomes between TKAs performed with or without a navigation system.

Résumé:

Cette étude a pour but de comparer le devenir clinique et radiologique de prothèses totales du genou avec ou sans utilisation d'un système de navigation. 43 prothèses ont été réalisées avec navigation et 42 sans navigation. Le suivi minimum a été de deux ans. Nous avons comparé les résultats cliniques incluant la mobilité, le score HSS, le score WOMAC. Sur le plan radiologique nous avons évalué les axes en position debout. Les scores HSS et WOMAC montraient une très nette amélioration au suivi final dans les deux groupes mais, sans différence significative entre-eux (p > 0,5). De la même façon nous n'avons pas trouvé de différence significative au niveau de la mobilité (p = 0,962). Par contre, la réalisation d'une prothèse totale du genou avec un système de navigation permet d'améliorer de façon significative l'axe mécanique angulaire de la prothèse en évitant un certain nombre d'anomalies axiales extrêmes que l'on peut rencontrer lorsque l'on réalise ces prothèses sans navigation. Cependant, il n'est pas possible de trouver une différence sur le plan fonctionnel entre les prothèses totales du genou réalisées avec ou sans système de navigation.

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Authors and Affiliations

  1. Center for Joint Disease, Chonnam National University Hwasun Hospital, 160 Ilsimri Hwasuneup, Hwasungun, Cheollamando, 501-757, Republic of Korea

    Jong Keun Seon, Sang Jin Park & Eun Kyoo Song

  2. Department of Orthopedics, Bioengineering Laboratories, Massachusetts General Hospital, Boston, MA, USA

    Gang Li & Michal Kozanek

  3. Department of Orthopedics, Chonnam National University Hospital, Gwang-Ju, Republic of Korea

    Keun Bae Lee

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  1. Jong Keun Seon
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  2. Sang Jin Park
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  4. Gang Li
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  6. Eun Kyoo Song
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Correspondence to Eun Kyoo Song.

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Seon, J.K., Park, S.J., Lee, K.B. et al. Functional comparison of total knee arthroplasty performed with and without a navigation system. International Orthopaedics (SICOT) 33, 987–990 (2009). https://doi.org/10.1007/s00264-008-0594-z

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  • DOI: https://doi.org/10.1007/s00264-008-0594-z

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