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Total knee arthroplasty implanted with and without kinematic navigation

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Abstract

Between September 2000 and February 2002 we inserted 120 total knee arthroplasties. In 60 patients we used the standard technique, and in 60 patients we used the OrthoPilot navigation system. Postoperatively all patients had standing long radiographs of the lower extremity from the hip joint to the ankle. We considered the ideal value of the anatomic lateral tibiofemoral angle (LTFA) to be 174°. In the standard group the mean value of LTFA was 174.9° and in the navigation group 174.3°. A deviation between 0° and 2° from the ideal value was seen in 42 cases in the standard group and in 53 cases in the navigation group. In the standard group 18 cases had a deviation of more than 2.1°, whereas there were only seven cases in the navigation group with a deviation exceeding 2.1°. There were no complications related to the use of the navigation system. The system affords a possibility to place femoral and tibial components precisely with less axis deviation than with the conventional technique.

Résumé

Entre septembre 2000 et février 2002 nous avons implanté 120 arthroplasties totales du genou. Chez 60 malades nous avons utilisé la technique standard et chez 60 malades nous avons utilisé le système de navigation OrthoPilot. Après l'opération tous les malades avaient une grande radiographie du membre inférieur, de la hanche à la cheville. Nous avons considéré que la valeur idéale de l'angle tibiofémoral latéral (LTFA) était de 174°. Dans le groupe standard la valeur moyenne de LTFA était 174.9°, dans le groupe navigation de 174.3°. Une déviation entre 0° et 2° de la valeur idéale a été notée dans 42 cas dans le groupe standard et dans 53 cas dans le groupe navigation. Dans le groupe standard 18 cas avaient une déviation de plus que 2.1°, alors qu'il y avait seulement 7 cas dans le groupe navigation avec une déviation dépassant 2.1°. Il n'y avait pas de complications relatives à l'usage du système de navigation. Le système offre une possibilité de placer les composants fémoral et tibial précisément avec moins de déviation de l'axe qu'avec la technique conventionnelle.

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Authors and Affiliations

  1. Alloplasty Center, Trauma Hospital, 6 Ponávka Street, 662 50, Brno, Czech Republic

    R. Hart, M. Janeček, A. Chaker & P. Buček

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  1. R. Hart
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  2. M. Janeček
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  3. A. Chaker
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  4. P. Buček
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Correspondence to R. Hart.

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Hart, R., Janeček, M., Chaker, A. et al. Total knee arthroplasty implanted with and without kinematic navigation. International Orthopaedics (SICOT) 27, 366–369 (2003). https://doi.org/10.1007/s00264-003-0501-6

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