title: In vivo kinematic comparison of posterior cruciate ligament retention or sacrifice with a mobile bearing total knee arthroplasty.
abstract: Video fluoroscopy and computer photogrammetry was used to evaluate 20 knees with posterior cruciate ligament (PCL) retaining and 19 knees with PCL sacrificing total knee arthroplasties (TKAs) with a mobile bearing total condylar prosthesis compared with 10 normal patients. In extension, femorotibial contact was posterior for TKA patients (P<.05) and demonstrated anterior translation from 60 degrees-90 degrees flexion. However, posterior rollback with limited translation was seen from 0 degrees-40 degrees, which may reflect the high congruity of this prosthesis. Fifty percent of meniscal bearing implants demonstrated bearing translation. Kinematics and weight-bearing range of motion were similar with PCL retention or sacrifice.
authors.affiliation: Midwest Orthopaedic Biomechanical Laboratory, St Luke's Medical Center, Milwaukee, Wis, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Stiehl
authors.forename: D A
authors.initials: DA
authors.lastname: Dennis
authors.forename: R D
authors.initials: RD
authors.lastname: Komistek
authors.forename: P A
authors.initials: PA
authors.lastname: Keblish
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D005260:Female; D005471:Fluoroscopy / Q000379:methods; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D008297:Male; D016119:Posterior Cruciate Ligament / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular; D014741:Video Recording; D016474:Weight-Bearing