title: Translational and rotational knee joint stability in anterior and posterior cruciate-retaining knee arthroplasty.
abstract: This study investigated passive translational and rotational stability properties of the intact knee joint, after bicruciate-retaining bi-compartmental knee arthroplasty (BKA) and after posterior cruciate retaining total knee arthroplasty (TKA). Fourteen human cadaveric knee specimens were used in this study, and a robotic manipulator with six-axis force/torque sensor was used to test the joint laxity in anterior-posterior translation, valgus-varus, and internal-external rotation. The results show the knee joint stability after bicruciate-retaining BKA is similar to that of the native knee. On the other hand, the PCL-retaining TKA results in inferior joint stability in valgus, varus, external rotation, anterior and, surprisingly, posterior directions. Our findings suggest that, provided functional ligamentous structures, bicruciate-retaining BKA is a biomechanically attractive treatment for joint degenerative disease.
authors.affiliation: Biomechanics Research Laboratory, Department of Orthopaedics, University of Tübingen, Tübingen, Germany.
authors.forename: JiaHsuan
authors.initials: J
authors.lastname: Lo
authors.forename: Otto
authors.initials: O
authors.lastname: Müller
authors.forename: Torsten
authors.initials: T
authors.lastname: Dilger
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Wülker
authors.forename: Markus
authors.initials: M
authors.lastname: Wünschel
mesh_terms: D000368:Aged; D016118:Anterior Cruciate Ligament / Q000502:physiology*; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology / Q000517:prevention & control*; D007719:Knee Joint / Q000502:physiology* / Q000601:surgery; D016119:Posterior Cruciate Ligament / Q000502:physiology*; D012371:Robotics; D012399:Rotation