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„Kreuzbandschrumpfung“—eine biomechanische Studie

Schrumpfung von elongierten Kreuzbändern unter Anwendung von Radiofrequenzenergie

Shrinkage of cruciate ligaments—a biomechanical study

Shrinkage of elongated cruciate ligaments using radiofrequency

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Zusammenfassung

Ziel der vorliegenden Untersuchung war es, biomechanische Eigenschaften nativer und experimentell elongierter vorderer boviner Kreuzbänder nach Applikation von bipolarer Radiofrequenzenergie zu evaluieren.

Mit einer Materialprüfmaschine wurden die biomechanischen Eigenschaften von intakten (Gruppe 1, n=20) und zyklisch elongierten Rinderkreuzbändern (Gruppe 2, n=20) nach der Applikation von bipolarer Radiofrequenzenergie (ArthroCare®) bestimmt. Nach einem zyklischen Lastprotokoll (1000×400 N) wurden Elongation, Versagenslast, maximale Last und Steifigkeit evaluiert. Als Kontrollgruppe dienten native Rinderkreuzbänder (Gruppe 3, n=20).

Durch die Applikation von Radiofrequenzenergie konnten sowohl intakte (Gruppe 1), als auch experimentell elongierte Kreuzbänder (Gruppe 2) um 4 mm verkürzt werden. Im Vergleich zur Kontrollgruppe zeigten die radiochirurgisch behandelten Kreuzbänder beider Gruppen nach zyklischer Last eine höhere Elongation sowie eine signifikant reduzierte Versagenslast, maximale Last und Steifigkeit (p<0,05), wobei die Kreuzbänder der Gruppe 2 die geringsten Werte erbrachten.

Durch die Applikation von radiochirurgischer Energie kam es zu einer deutlichen biomechanischen Schwächung der getesteten Kreuzbänder. Sollte Radiofrequenzenergie bei der Behandlung elongierter Kreuzbänder trotzdem zur Anwendung kommen, ist eine sehr restriktive Nachbehandlung zu empfehlen.

Abstract

The aim of this study was to evaluate structural properties of native and elongated bovine anterior cruciate ligaments after the application of bipolar radiofrequency.

Using a material testing machine typical load-elongation curves were used to determine the initial strength of untreated (group 1, n=20) and elongated cruciate ligaments (group 2, n=20) after treatment with bipolar radiofrequency (ArthroCare®). After the application of a cyclic loading protocol (1000×400 N) elongation, yield load, maximal load, and stiffness were determined. Native ligaments served as a control group (group 3, n=20).

In both groups 4 mm reduction in length was caused by the application of radiofrequency. Elongation was significantly higher; yield load, maximal load, and stiffness of cruciate ligaments treated with radiofrequency (groups 1 and 2) were significantly reduced after the application of a cyclic loading protocol in comparison to the control group (p<0.05). Group 2 ligaments showed the lowest values.

The application of radiofrequency weakens the biomechanical properties of native and elongated cruciate ligaments significantly. When radiofrequency energy is used to shrink elongated cruciate ligaments, a nonaggressive rehabilitation protocol should be applied.

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Danksagung

Wir danken Herrn S. Zander und Herrn A. Studt für die technische Hilfe. Das Radiofrequenzsystem wurde von der Firma ArthroCare®, Radevormwald, Deutschland zur Verfügung gestellt.

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Authors and Affiliations

  1. Klinik für Unfall-, Hand- und Wiederherstellungschirurgie, Universitätsklinikum, Münster

    A. Weimann, T. Fuchs &  W. Petersen

  2. Klinik für Orthopädie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel

    M. Jahnke & W. Drescher

  3. Department of Orthopaedic Surgery, University, Pittsburgh

    T. Zantop

  4. Klinik für Unfall-, Hand- und Wiederherstellungschirurgie, Universitätsklinikum, Waldeyerstraße 1, 48149, Münster

    W. Petersen

Authors
  1. A. Weimann
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  2. M. Jahnke
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  3. T. Zantop
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  4. T. Fuchs
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  5. W. Drescher
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  6. W. Petersen
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Correspondence to W. Petersen.

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Weimann, A., Jahnke, M., Zantop, T. et al. „Kreuzbandschrumpfung“—eine biomechanische Studie. Unfallchirurg 107, 671–675 (2004). https://doi.org/10.1007/s00113-004-0781-3

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  • DOI: https://doi.org/10.1007/s00113-004-0781-3

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