title: Re-dislocation after revision total hip arthroplasty for recurrent dislocation: a multicentre study.
abstract: Although most case of dislocations after total hip arthroplasty (THA) can be managed with conservative treatment, recurrent dislocation may require surgical intervention. This multicentre study was conducted to evaluate the re-dislocation rate after revision THA for recurrent dislocation, and to determine the risk factors for re-dislocation.
  
  
  
  We retrospectively reviewed the 88 hips in 88 patients who underwent revision THA for recurrent dislocation at five institutions between 1995 and 2014. The mean patient age at surgery was 68.5 years and the mean follow-up period was 53.1 months. Multivariate logistic regression was performed to identify risk factors for re-dislocation.
  
  
  
  Sixteen hips in 16 patients (18.2 %) re-dislocated at a mean of 25.5 months (range, 1-83 months) after revision THA. Multivariate analysis identified osteonecrosis of the femoral head (odds ratio [OR] = 5.62 vs. osteoarthritis) and a femoral head size < 32 mm (OR = 3.86) as independent risk factors for re-dislocation. Eight hips required additional revision THA for re-dislocation.
  
  
  
  The re-dislocation rate after revision THA for recurrent dislocation remains high, suggesting the need for prevention measures. We recommend the use of a femoral head size ≥ 32 mm.
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Kensei
authors.initials: K
authors.lastname: Yoshimoto
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. yasunaka@ortho.med.kyushu-u.ac.jp.
authors.forename: Yasuharu
authors.initials: Y
authors.lastname: Nakashima
authors.affiliation: Department of Orthopaedics, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Aota
authors.affiliation: Department of Orthopaedic Surgery, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahokugun, Ishikawa, 920-0293, Japan.
authors.forename: Ayumi
authors.initials: A
authors.lastname: Kaneuji
authors.affiliation: Department of Orthopaedic Surgery, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahokugun, Ishikawa, 920-0293, Japan.
authors.forename: Kiyokazu
authors.initials: K
authors.lastname: Fukui
authors.affiliation: Shonan Kamakura Joint Reconstruction Center, 5-4-17 Dai, Kamakura, Kanagawa, 247-0061, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Hirakawa
authors.affiliation: Shonan Kamakura Joint Reconstruction Center, 5-4-17 Dai, Kamakura, Kanagawa, 247-0061, Japan.
authors.forename: Nariaki
authors.initials: N
authors.lastname: Nakura
authors.affiliation: Department of Orthopaedic Surgery, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, 814-0133, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Kinoshita
authors.affiliation: Department of Orthopaedic Surgery, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, 814-0133, Japan.
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Naito
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Iwamoto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D004204:Joint Dislocations / Q000453:epidemiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D012086:Reoperation / Q000009:adverse effects*; D012189:Retrospective Studies; D012307:Risk Factors
keywords: Dislocation; Large femoral head; Osteonecrosis of femoral head; Recurrent dislocation; Revision total hip arthroplasty