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A simple method for determining ligament stiffness during total knee arthroplasty in vivo

  • A key requirement in both native knee joints and total knee arthroplasty is a stable capsular ligament complex. However, knee stability is highly individual and ranges from clinically loose to tight. So far, hardly any in vivo data on the intrinsic mechanical of the knee are available. This study investigated if stiffness of the native ligament complex may be determined in vivo using a standard knee balancer. Measurements were obtained with a commercially available knee balancer, which was initially calibrated in vitro. 5 patients underwent reconstruction of the force-displacement curves of the ligament complex. Stiffness of the medial and lateral compartments were calculated to measure the stability of the capsular ligament complex. All force-displacement curves consisted of a non-linear section at the beginning and of a linear section from about 80 N onwards. The medial compartment showed values of 28.4 ± 1.2 N/mm for minimum stiffness and of 39.9 ± 1.1 N/mm for maximum stiffness; the respective values for the lateral compartment were 19.9 ± 0.9 N/mm and 46.6 ± 0.8 N/mm. A commercially available knee balancer may be calibrated for measuring stiffness of knee ligament complex in vivo, which may contribute to a better understanding of the intrinsic mechanical behaviour of knee joints.

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Metadaten
Verfasserangaben:Florian Völlner, Tim A. Weber, Markus Weber, Tobias Renkawitz, Sebastian DendorferORCiD, Joachim GrifkaORCiD, Benjamin Craiovan
DOI:https://doi.org/10.1038/s41598-019-41732-x
Titel des übergeordneten Werkes (Englisch):Scientific Reports
Verlag:Nature
Dokumentart:Artikel aus einer Zeitschrift/Zeitung
Sprache der Veröffentlichung:Englisch
Jahr der Veröffentlichung:2019
Datum der Freischaltung:27.04.2020
GND-Schlagwort:Biomechanische Analyse; Kniegelenkband; Steifigkeit
Jahrgang:9
Aufsatznummer:5261
Erste Seite:1
Letzte Seite:8
Fakultäten / Institute / Einrichtungen:Fakultät Maschinenbau
Regensburg Center of Biomedical Engineering - RCBE
Fakultät Maschinenbau / Labor Biomechanik (LBM)
Begutachtungsstatus:peer-reviewed
OpenAccess Publikationsweg:Gold Open Access- Erstveröffentlichung in einem/als Open-Access-Medium
Forschungsschwerpunkt:Lebenswissenschaften und Ethik
Lizenz (Deutsch):Creative Commons - CC BY - Namensnennung 4.0 International