title: Ten year results of transtrochanteric valgus osteotomy with or without the shelf procedure.
abstract: OBJECTIVE
  The purpose of this study was to examine retrospectively the effectiveness of Sugioka's transtrochanteric valgus osteotomy (TVO) combined with the shelf procedure for patients who had advanced osteoarthritis (OA) of the hip with severe acetabular dysplasia.
  
  
  METHODS
  Sixty-two hips in 61 patients were reviewed retrospectively between April 1993 and March 2009. Of these hips, 25 hips with the pre-operative acetabular head index (AHI) ≥ 60 % (single group) underwent a TVO, whereas the other 37 with AHI < 60 % (combined group) underwent a TVO combined with the shelf procedure.
  
  
  RESULTS
  Using conversion to total hip arthroplasty as the endpoint, the Kaplan-Meier survival rates at ten years were calculated to be 85.5 % for the single group and 100 % for the combined group; there was a significant difference between the two groups (p < 0.05, log-rank test). Similarly, calculated using progressive OA as the endpoint, survival rates at ten years were 69.5 % and 89.3 % respectively; there was also a significant difference between the two groups (p < 0.05, log-rank test). In the single group, the latest radiographic evaluations of the patients with the pre-operative AHI ≥ 70 % were significantly better than those of the patients with the pre-operative AHI < 70 % (P < 0.05).
  
  
  CONCLUSIONS
  More satisfactory ten year results of TVO were obtained in cases that had a pre-operative AHI of ≥70 %, or where the shelf procedure was added. It is desirable that acetabuloplasty be added for patients with pre-operative AHI < 70 %.
authors: Department of Orthopaedic Surgery, Graduate School of Biomedical Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima City, 734-8551, Japan. d103584@hiroshima-u.ac.jp
authors: Ryo
authors: R
authors: Mori
authors: Yuji
authors: Y
authors: Yasunaga
authors: Takuma
authors: T
authors: Yamasaki
authors: Michio
authors: M
authors: Hamanishi
authors: Takeshi
authors: T
authors: Shoji
authors: Mitsuo
authors: M
authors: Ochi
mesh_terms: D000328:Adult; D015897:Comorbidity; D005260:Female; D005272:Femur Neck / Q000000981:diagnostic imaging / Q000601:surgery*; D006617:Hip Dislocation / Q000453:epidemiology / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000453:epidemiology / Q000601:surgery*; D010027:Osteotomy / Q000295:instrumentation / Q000379:methods*; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome
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