title: Total knee arthroplasty for treatment of osteoarthritis with prolonged patellar dislocation.
abstract: Prolonged dislocation of the patella is a rare condition and is often related to severe osteoarthritis (OA) of the femorotibial (FT) joint. For this condition's treatment, numerous surgical techniques using total knee arthroplasty (TKA) have been published. To the best of our knowledge, this case report is the first description of the use of lateral release alone to treat recurrent patellar subluxation with TKA. An interesting point in this case is that the patient had a good recovery after TKA in spite of quite a long-term (a duration of almost 55 years) dislocation of her patella and development of secondary OA. We describe a case that we treated by TKA for FT-OA with a prolonged patellar dislocation. We were able to obtain good patellar reduction without additional surgery by performing adequate lateral release of the patellar retinaculum. This clinical case indicates the usefulness of lateral patellar retinaculum release for obtaining stable patellar tracking in TKA for FT-OA with remaining lateral patellar dislocation. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan; Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK.
authors.forename: Kosuke
authors.initials: K
authors.lastname: Kumagai
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Kubo
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Maeda
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Araki
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Suguru
authors.initials: S
authors.lastname: Shioji
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Okumura
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Hitomi
authors.initials: H
authors.lastname: Fujikawa
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Kawasaki
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Imai
authors.affiliation: Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Matsusue
keywords: osteoarthritis; prolonged patellar dislocation; total knee arthroplasty