title: Navigation-Assisted Total Knee Arthroplasty for Osteoarthritis with Extra-Articular Femoral Deformity and/or Retained Hardware.
abstract: Total knee arthroplasty (TKA) for osteoarthritis (OA) patients with extra-articular deformity is still challenging because angular deformity, canal sclerosis, or the retained hardware that precludes the use of the traditional intramedullary guide. In addition, atypical bone cut for intra-articular correction leads to imbalanced soft tissue gap. Furthermore, corrective osteotomy should be considered for severe deformity or para-articular deformity cases. Recently, navigation-assisted TKA has been reported to increase the accuracy of prosthetic positioning and limb alignment. This system can calculate mechanical axis regardless of extra-articular deformity, canal sclerosis, or retained hardware. Accordingly, navigation surgery has been considered to be a powerful option especially in TKAs with extra-articular deformity cases. Here, we report 3 successful navigation-assisted TKAs for osteoarthritis with extra-articular deformities and/or retained hardware. Navigation-assisted TKA is an effective and reliable alternative for patients with extra-articular deformities.
authors.affiliation: Department of Orthopedics, Institute of Health Biosciences, University of Tokushima, Graduate School, 3-18-15 Kuramoto, Tokushima 770-8503, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Hamada
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Egawa
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Goto
authors.forename: Tomoya
authors.initials: T
authors.lastname: Takasago
authors.forename: Michihiro
authors.initials: M
authors.lastname: Takai
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Hirano
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Kawasaki
authors.forename: Natsuo
authors.initials: N
authors.lastname: Yasui