title: The risk of revision in total knee arthroplasty is not affected by previous high tibial osteotomy.
abstract: OBJECTIVE
  Previous studies have found different outcomes after revision of knee arthroplasties performed after high tibial osteotomy (HTO). We evaluated the risk of revision of total knee arthroplasty with or without previous HTO in a large registry material.
  
  
  METHODS
  31,077 primary TKAs were compared with 1,399 TKAs after HTO, using Kaplan-Meier 10-year survival percentages and adjusted Cox regression analysis.
  
  
  RESULTS
  The adjusted survival analyses showed similar survival in the 2 groups. The Kaplan-Meier 10-year survival was 93.8% in the primary TKA group and 92.6% in the TKA-post-HTO group. Adjusted RR was 0.97 (95% CI: 0.77-1.21; p = 0.8).
  
  
  CONCLUSIONS
  In this registry-based study, previous high tibial osteotomy did not appear to compromise the results regarding risk of revision after total knee arthroplasty compared to primary knee arthroplasty.
authors.affiliation: a 1 Kysthospital in Hagavik, Hagavik.
authors.forename: Mona
authors.initials: M
authors.lastname: Badawy
authors.affiliation: b 2 The Norwegian Arthroplasty Register, Department of Orthopedic Surgery , Haukeland University Hospital, Bergen.
authors.forename: Anne M
authors.initials: AM
authors.lastname: Fenstad
authors.affiliation: a 1 Kysthospital in Hagavik, Hagavik.|c 3 Department of Clinical Medicine, Institute of Medicine and Dentistry , University of Bergen, Bergen, Norway.
authors.forename: Kari
authors.initials: K
authors.lastname: Indrekvam
authors.affiliation: b 2 The Norwegian Arthroplasty Register, Department of Orthopedic Surgery , Haukeland University Hospital, Bergen.|c 3 Department of Clinical Medicine, Institute of Medicine and Dentistry , University of Bergen, Bergen, Norway.
authors.forename: Leif I
authors.initials: LI
authors.lastname: Havelin
authors.affiliation: b 2 The Norwegian Arthroplasty Register, Department of Orthopedic Surgery , Haukeland University Hospital, Bergen.|c 3 Department of Clinical Medicine, Institute of Medicine and Dentistry , University of Bergen, Bergen, Norway.
authors.forename: Ove
authors.initials: O
authors.lastname: Furnes
mesh_terms: D000367:Age Factors; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D001315:Australia / Q000453:epidemiology; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007720:Knee Prosthesis / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000009:adverse effects*; D020959:Polyethylene; D011475:Prosthesis Failure / Q000209:etiology*; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data*; D012307:Risk Factors; D013977:Tibia / Q000601:surgery*; D013997:Time Factors
chemical_list: D020959:Polyethylene