title: Patient satisfaction at 2 months following total knee replacement using a second generation medial-pivot system: follow-up of 250 consecutive cases.
abstract: BACKGROUND
  Patient dissatisfaction following total knee replacement (TKR) has been reported as high as 24%. Most previous studies have focused on satisfaction for TKR overall, with few reporting satisfaction for specific implant designs. The purpose of this study was to assess patient satisfaction for TKRs performed using a second generation medial-pivot system (EVOLUTION®, MicroPort Orthopedics Inc., Arlington, TN, USA).
  
  
  METHODS
  Of a single surgeon's first 250 consecutive TKRs performed using the subject system, 224 completed a patient satisfaction assessment, the Knee Injury and Osteoarthritis Outcome Score (KOOS), range of motion, and radiographs at 2 months follow-up.
  
  
  RESULTS
  The overall very satisfied/satisfied rate was 94.6% at 2 months. Following the first 50 TKRs, the satisfied rate improved to 99.4% suggesting a bias towards the initial cases potentially due to learning the system and instrumentation. Overall KOOS, range of motion, and radiographic outcomes were satisfactory at final follow-up.
  
  
  CONCLUSIONS
  In conclusion, more subjects implanted with a second generation medial-pivot system were satisfied compared to previous reports for TKR.
authors.affiliation: Hip & Knee Clinic, AZ Maria Middelares, Gent, Belgium.
authors.forename: Philippe P
authors.initials: PP
authors.lastname: Van Overschelde
authors.affiliation: Clinical Affairs, Microport Orthopedics Inc., Arlington, TN, USA.
authors.forename: David A
authors.initials: DA
authors.lastname: Fitch
keywords: Total knee arthroplasty; medial-pivot; patient satisfaction; total knee replacement (TKR)