title: Long-term results of total knee arthroplasty in young and active patients with posterior stabilized design.
abstract: BACKGROUND
  The aim of this study was to evaluate long-term quality and performance of cemented posterior-stabilized (PS) total knee arthroplasty (TKA) in young and active patients with gap balancing technique.
  
  
  METHODS
  Between January 2000 and October 2001, 55 TKAs (21 rotating platform [RP] and 34 fixed bearing [FB]) in 41 patients, 60 years and younger, with University of California Los Angeles (UCLA) activity score of five and above were included in this study and prospectively followed. Clinical assessments included Western Ontario and McMaster Universities (WOMAC), Knee Society, UCLA activity score, and Patient Administered Questionnaire (PAQ). Radiographic measurements included component positioning, patellar tilt and thickness, radiolucency, loosening or osteolysis.
  
  
  RESULTS
  At a mean follow-up of 12.3±0.5 years (11 to 13), there was no instability, malalignment, or patellofemoral maltracking. Sixty eight percent of patients were still participating in regular recreational activities at the final follow-up. The mean satisfaction score was 9.1±1.9 and 8.5±2.1 in RP-PS and FB-PS groups, respectively. There was no malalignment or osteolysis, no revision for osteolysis or loosening. One patient in the FB-PS group underwent open reduction and internal fixation for a peri-prosthetic fracture. Overall Kaplan-Meier survivorship was 98%.
  
  
  CONCLUSIONS
  The PS TKA in young and active patients can provide long-term durability and high quality of function.
  
  
  METHODS
  III.
authors.affiliation: Orthopaedic Surgery, NYU Langone Medical Center, Hospital for Joint Disease, United States. Electronic address: MeftahM@hss.edu.
authors.forename: Morteza
authors.initials: M
authors.lastname: Meftah
authors.affiliation: Orthopaedic Surgery, Hospital for Special Surgery, 535 E. 70th Street, 6th floor, New York, NY 10021, United States.
authors.forename: Peter B
authors.initials: PB
authors.lastname: White
authors.affiliation: Orthopaedic Surgery, Hospital for Special Surgery, 535 E. 70th Street, 6th floor, New York, NY 10021, United States.
authors.forename: Amar S
authors.initials: AS
authors.lastname: Ranawat
authors.affiliation: Orthopaedic Surgery, Hospital for Special Surgery, 535 E. 70th Street, 6th floor, New York, NY 10021, United States.
authors.forename: Chitranjan S
authors.initials: CS
authors.lastname: Ranawat
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005544:Forecasting; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000175:diagnosis / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: Active; Gap balancing; Performance; Posterior stabilized; Total knee arthroplasty; Young