Total knee replacement influences both knee and hip joint kinematics during stair climbing.
A gait analysis system was used to evaluate the kinematics of the hip and knee during stair ascending and descending after operation with total knee replacement. Patients with 5 degrees varus/valgus alignment or less were selected randomly to receive either a flat or a concave tibial component with retention of the posterior cruciate ligament. Patients who had more than 5 degrees varus/valgus alignment and/or an extension defect of 10 degrees or more were selected randomly to receive the concave or posterior-stabilized tibial component with resection of the posterior cruciate ligament. Twenty patients and 17 controls were studied 1-2 years after the operation. Patients had abnormal kinematics during stair ascending and descend-ing. Both knee extension and flexion were reduced. Hip extension tended to decrease, and decreased hip extension moment was noted.
Department of Orthopaedics, Sahlgrenska University Hospital and Göteborg University, Sweden. tuuli.saari@vgregion.se
Tuuli
T
Saari
Roy
R
Tranberg
Roland
R
Zügner
Johan
J
Uvehammer
Johan
J
Kärrholm
D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D005260:Female; D005684:Gait / Q000502:physiology*; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D018709:Statistics, Nonparametric