title: Intraoperative medial pivot affects deep knee flexion angle and patient-reported outcomes after total knee arthroplasty.
abstract: The aim of this study was to evaluate the relationship between clinical results including patient-reported outcomes and intraoperative knee kinematic patterns after total knee arthroplasty (TKA). A cross-sectional survey of forty consecutive medial osteoarthritis patients who had a primary TKA using a CT-based navigation system was conducted. Subjects were divided into two groups based on intraoperative kinematic patterns: a medial pivot group (n = 20) and a non-medial pivot group (n = 20). Subjective outcomes with the new Knee Society Score and clinical outcomes were evaluated. The functional activities, patient satisfaction and the knee flexion angle of the medial pivot group were significantly better than those of the non-medial pivot group. An intraoperative medial pivot pattern positively influences deep knee flexion and patient-reported outcomes.
authors: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors: Yusuke
authors: Y
authors: Nishio
authors: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors: Tomohiro
authors: T
authors: Onodera
authors: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors: Yasuhiko
authors: Y
authors: Kasahara
authors: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Department of Joint Replacement and Tissue Engineering, Hokkaido University Graduate School of Medicine, Kita-Ku, Sapporo, Japan.
authors: Daisuke
authors: D
authors: Takahashi
authors: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors: Norimasa
authors: N
authors: Iwasaki
authors: Department of Orthopaedic Surgery, International University of Health and Welfare, Nasushiobara, Japan.
authors: Tokifumi
authors: T
authors: Majima
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular; D057566:Self Report; D025321:Surgery, Computer-Assisted; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: kinematics pattern; medial pivot pattern; patient-reported outcomes; total knee arthroplasty