title: Outcomes of the different types of total knee arthroplasty with the identical femoral geometry.
abstract: OBJECTIVE
  There are controversies around the role of the posterior cruciate ligament and the effect of design modifications for high flexion in total knee arthroplasty (TKA). So, we compared the clinical outcomes of the cruciate retaining (CR), posterior stabilized (PS), and high flexion posterior stabilized (F-PS) designs in TKA with identical femoral geometry.
  
  
  METHODS
  One hundred seventy nine knees with 3 different types of prostheses after a minimum 5-year follow-up were enrolled in this retrospective study: 45 with CR, 40 with PS and 94 with F-PS. The mean ages of these groups were 65.7, 67.2, and 67.5, and the mean durations of follow-up were 8.1, 8.0, and 6.8 years, respectively. We compared the range of motion, functional outcomes, and radiographic measurements at the 2-year follow-up and last follow-up.
  
  
  RESULTS
  The maximal flexion angle was significantly lower in the CR group than the F-PS group at the 2-year follow-up. However, there was no significant difference at the last follow-up. Functional outcomes and survival rate of the three groups were similar at the last follow-up.
  
  
  CONCLUSIONS
  Three different types of TKAs (CR, PS and F-PS) with identical femoral geometry showed similar mid-term outcomes with regard to the range of motion, functional outcomes and survival rate.
authors.affiliation: Department of Orthopedic Surgery, Eulji University College of Medicine, Daejeon, Korea.
authors.forename: Sang Min
authors.initials: SM
authors.lastname: Lee
authors.forename: Sang Cheol
authors.initials: SC
authors.lastname: Seong
authors.forename: Sahnghoon
authors.initials: S
authors.lastname: Lee
authors.forename: Won Chul
authors.initials: WC
authors.lastname: Choi
authors.forename: Myung Chul
authors.initials: MC
authors.lastname: Lee