title: [Long-term results after uni- and bilateral high tibial osteotomies].
abstract: OBJECTIVE
  This study compares the long-term results of uni- and bilateral high tibial osteotomies.
  
  
  METHODS
  94 osteotomies (72 patients) were followed for 12.7 +/- 2.4 years after osteotomy. Long-term results of 21 patients with bilateral osteotomies (42 osteotomies) were compared with 52 patients who had a unilateral high tibial osteotomy. Endpoint of survival, was defined as implantation of a knee endoprosthesis (Kaplan-Meier analysis). At follow-up clinical results were evaluated by the knee society score and X-rays were analysed for axis and grade of arthrosis.
  
  
  RESULTS
  Out of 94 high tibial osteotomies 22 (23 %) ended 1 - 13 years later in a knee endoprosthesis. In 11 of the 42 bilateral high tibial osteotomies (26 %; after 2 - 13 years, median 8 years) and 11 of 52 (21 %; after 1 - 11 years, median 8 years) unilateral osteotomies an endoprosthesis was implanted. Kaplan-Meier analysis resulted in no statistical difference in survival between the two groups (p = 0.6517). Additionally, clinical and radiological results were equal.
  
  
  CONCLUSIONS
  We conclude that there is no long-term difference between uni- and bilateral high tibial osteotomies and both indications can be recommended due their satisfactory long-term results.
authors.affiliation: Universitätsklinik für Orthopädie, Universität Wien, Vienna, Austria. Klemens.trieb@akh-wien.ac.at
authors.forename: K
authors.initials: K
authors.lastname: Trieb
authors.forename: E
authors.initials: E
authors.lastname: Cetin
authors.forename: T
authors.initials: T
authors.lastname: Stulnig
authors.forename: A
authors.initials: A
authors.lastname: Wanivenhaus
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data; D017760:Bone Malalignment / Q000000981:diagnostic imaging / Q000601:surgery*; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000601:surgery; D011859:Radiography; D012086:Reoperation / Q000706:statistics & numerical data; D016019:Survival Analysis; D013977:Tibia / Q000000981:diagnostic imaging / Q000601:surgery*