title: Posterior femoral condylar offset after total knee replacement in the risk of knee flexion contracture.
abstract: The aim of this study was to clarify the risk of knee flexion contracture associated with a posterior femoral condylar offset after total knee replacement (TKR). Radiographs from 100 healthy Japanese volunteers were included in the study. We evaluated femoral component posterior offset in various implants and compared them with the normal Japanese knee. Posterior offset of the femoral condyle is up to a maximum of 4.7 times greater than that of the healthy Japanese knee in all knee implants. Excess posterior offset of the femoral condyle in TKR prostheses may cause knee joint flexion contracture due to the relative shortening of the posterior soft tissue.
authors.affiliation: Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Onodera
authors.forename: Tokifumi
authors.initials: T
authors.lastname: Majima
authors.forename: Osamu
authors.initials: O
authors.lastname: Nishiike
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kasahara
authors.forename: Daisuke
authors.initials: D
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D003286:Contracture / Q000000981:diagnostic imaging / Q000517:prevention & control*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000517:prevention & control*; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular; D012307:Risk Factors; D016896:Treatment Outcome
keywords: extension gap; implant design; posterior condylar offset; total knee arthroplasty