J Arthroplasty 2003 Jun;18(4):513-5
Orthopedic Department University Hospital Zürich, Switzerland.
J Orthop Sci 2005 ;10(1):37-41
Ishii Orthopaedic and Rehabilitation Clinic, 1089 Shimo-Oshi, Gyoda, 361-0037, Japan.
Proper soft tissue tension is one of the important factors in mobile-bearing total knee arthroplasty (TKA). We evaluated varus/valgus laxities, particularly at flexion, which is a key factor in reducing the risk of subluxation and dislocation of bearings to assess the effect that the flexion angle and the presence or absence of the posterior cruciate ligament (PCL) have on laxity in patients with low-contact stress (LCS) prostheses of the PCL-retaining (24 patients, 24 knees) and PCL-sacrificing (24 patients, 24 knees) type designs during extension and flexion. Both types of prosthesis had about 4 degrees laxity at extension and 3 degrees at flexion. Read More
Knee Surg Sports Traumatol Arthrosc 2014 Aug 17;22(8):1799-804. Epub 2013 Apr 17.
Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan,
Purpose: In vivo fluoroscopic analyses have revealed the kinematics after total knee arthroplasty (TKA), including femoral condylar lift-off. This study asked whether differences in static varus-valgus laxity or coronal limb alignment after TKA affect lift-off under weight-bearing conditions. It was hypothesised that there is a correlation between coronal laxity or alignment and lift-off during walking. Read More
Clin Biomech (Bristol, Avon) 2013 Aug 29;28(7):777-82. Epub 2013 Jun 29.
Division of Biomechanics and Engineering Design, K.U. Leuven, Leuven, Belgium; Department of Orthopedics and Traumatology, K.U. Leuven, Leuven, Belgium. Electronic address:
Background: Passive knee stability is provided by the soft tissue envelope. There is consensus among orthopedic surgeons that good outcome in Total Knee Arthroplasty requires equal tension in the medial/lateral compartment of the knee joint, as well as equal tension in the flexion/extension gap. The purpose of this study was to quantify the ligament laxity in the normal non-arthritic knee before and after Posterior-Stabilized Total Knee Arthroplasty. Read More
Knee Surg Sports Traumatol Arthrosc 2015 Jun 13;23(6):1693-8. Epub 2014 Jun 13.
Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
Purpose: The aim of the present study was to clarify whether varus-valgus laxities under static stress in extension, femoral condylar lift-off during walking, and patient-reported outcomes after total knee arthroplasty (TKA) were correlated with each other.
Methods: Ninety-four knees, which had undergone posterior-stabilized TKA, were analysed. The varus-valgus laxity during knee extension was measured using a stress radiograph. Read More