title: Revision total knee arthroplasty.
abstract: BACKGROUND
  Revision total knee arthroplasties are performed with increasing frequency due to the increasing numbers of primary arthroplasties.
  
  
  OBJECTIVE
  To retrospectively analyze 71 patients who underwent 78 revision total knee arthroplasties during the years 1991 to 1999
  
  
  METHODS
  We evaluated the revised knees using the Knee Society Clinical Rating System after an average follow-up period of 3 years and 9 months (2-10 years). The indications for revision included pain and instability, deep infection of the joint, complaints linked to the patella, or post-trauma to the operated knee.
  
  
  RESULTS
  The average knee score (evaluation of the knee joint itself) calculated after the revision was 74.5. The results on the knee score were excellent (> 85) in 48% of patients and poor (< 60) in 22%. The functional results (patient's ability to walk and climb stairs) were only 48.3.
  
  
  CONCLUSIONS
  Although the revision of total knee replacements is known to be problematic, most patients show good results on knee examination, and reasonable functional results given the factors involved.
authors.affiliation: Department of Orthopedic Surgery, Hebrew University-Hadassah Medical School, Jerusalem, Israel.
authors.forename: Shai
authors.initials: S
authors.lastname: Luria
authors.forename: Leonid
authors.initials: L
authors.lastname: Kandel
authors.forename: David
authors.initials: D
authors.lastname: Segal
authors.forename: Meir
authors.initials: M
authors.lastname: Liebergall
authors.forename: Yoav
authors.initials: Y
authors.lastname: Mattan
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D012720:Severity of Illness Index; D016896:Treatment Outcome