title: Posterior cruciate-retaining versus posterior-stabilized total knee arthroplasty for osteoarthritis with severe varus deformity.
abstract: OBJECTIVE
  The aim of this study was to compare the radiological and functional results of posterior cruciate ligament (PCL) - retaining and posterior-stabilized total knee arthroplasties in patients with severe varus gonarthrosis.
  
  
  METHODS
  Medical records of 112 knees of 96 patients who underwent total knee arthroplasty for severe varus (≥15°) were reviewed. PCL-retaining and PCL-stabilizing groups consisted of 58 and 54 knees, respectively. Mean follow-up time was 56.6 months (range: 24-112 months). Knee Society (KS) clinical rating system was used in clinical evaluation. Range of motion, degree of flexion contracture, postoperative alignment, and complication rates were compared between the groups.
  
  
  RESULTS
  Mean preoperative mechanical tibiofemoral angle was 20.1° in varus alignment, and was restored to 4.6° in valgus postoperatively. No statistically significant differences were found between PCL-stabilizing and PCL-retaining groups when KS knee scores, function scores, and flexion arc were evaluated. Two patients in PCL-retaining group underwent revision surgery due to aseptic loosening of tibial component. One patient in PCL-stabilizing group needed arthrotomy due to patellar clunk syndrome.
  
  
  CONCLUSIONS
  There were no notable differences between the 2 groups and PCL-retaining design had outcomes as good as PCL-stabilizing total knee implant in osteoarthritic knees with severe varus deformity.
  
  
  METHODS
  Level III, Therapeutic study.
authors.affiliation: Kartal State Hospital, Department of Orthopedics and Traumatology, Istanbul, Turkey.
authors.forename: Ethem Ayhan
authors.initials: EA
authors.lastname: Ünkar
authors.affiliation: Istanbul Training and Research Hospital, Department of Orthopedics and Traumatology, Istanbul, Turkey. Electronic address: yozturkmen@gmail.com.
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Öztürkmen
authors.affiliation: Istanbul Training and Research Hospital, Department of Orthopedics and Traumatology, Istanbul, Turkey.
authors.forename: Erhan
authors.initials: E
authors.lastname: Şükür
authors.affiliation: Medipol University Sefakoy Hospital, Department of Orthopedics and Traumatology, Istanbul, Turkey.
authors.forename: Engin
authors.initials: E
authors.lastname: Çarkçı
authors.affiliation: Yeni Yuzyil University Gaziosmanpasa Hospital, Department of Orthopedics and Traumatology, Istanbul, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Mert
mesh_terms: D000328:Adult; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000175:diagnosis / Q000601:surgery*; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D011184:Postoperative Period; D011859:Radiography; D016059:Range of Motion, Articular; D012086:Reoperation; D013977:Tibia / Q000601:surgery
keywords: Posterior cruciate ligament-retaining; Posterior cruciate ligament-stabilization; Total knee arthroplasty; Varus deformity