title: Effect of Tibial Posterior Slope on Knee Kinematics, Quadriceps Force, and Patellofemoral Contact Force After Posterior-Stabilized Total Knee Arthroplasty.
abstract: We used a musculoskeletal model validated with in vivo data to evaluate the effect of tibial posterior slope on knee kinematics, quadriceps force, and patellofemoral contact force after posterior-stabilized total knee arthroplasty. The maximum quadriceps force and patellofemoral contact force decreased with increasing posterior slope. Anterior sliding of the tibial component and anterior impingement of the anterior aspect of the tibial post were observed with tibial posterior slopes of at least 5° and 10°, respectively. Increased tibial posterior slope contributes to improved exercise efficiency during knee extension, however excessive tibial posterior slope should be avoided to prevent knee instability. Based on our computer simulation we recommend tibial posterior slopes of less than 5° in posterior-stabilized total knee arthroplasty.
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Shigetoshi
authors: S
authors: Okamoto
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Hideki
authors: H
authors: Mizu-uchi
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Ken
authors: K
authors: Okazaki
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Satoshi
authors: S
authors: Hamai
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Hiroyuki
authors: H
authors: Nakahara
authors: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors: Yukihide
authors: Y
authors: Iwamoto
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D005684:Gait / Q000502:physiology; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery; D053580:Muscle Strength; D057071:Patellofemoral Joint / Q000503:physiopathology* / Q000601:surgery; D052097:Quadriceps Muscle / Q000503:physiopathology* / Q000601:surgery; D013977:Tibia / Q000033:anatomy & histology* / Q000601:surgery; D016474:Weight-Bearing / Q000502:physiology
keywords: computer simulation; knee instability; patellofemoral contact force; quadriceps force; tibial posterior slope; total knee arthroplasty