title: Cementless bilateral synchronous total hip arthroplasty in ankylosing spondylitis with hip ankylosis.
abstract: OBJECTIVE
  This study was a retrospective analysis of early and mid-term clinical effects and perioperative management of cementless bilateral synchronous total hip arthroplasty (THA) in patients with ankylosing spondylitis (AS) with bilateral hip ankylosis.
  
  
  METHODS
  Fifteen AS patients (30 hips) with bilateral hip ankylosis were managed with cementless bilateral synchronous THA. Surgical outcome was evaluated using the visual analogue scale (VAS), the range of motion and the Harris score.
  
  
  RESULTS
  The mean follow-up period was 29.3 months. At the last follow-up visit, the VAS score decreased from 7.53 ± 0.99 before the operation to 2.40 ± 0.91. The Harris score increased from 24.8 ± 7.42 before the operation to 83.8 ± 4.61. The total range of motion increased from 78.73 ± 14.53 before the operation to 209.73 ± 16.19 after the operation. After the operation, there was one case of early hip dislocation, one case of femoral nerve stretch injury and one case of superficial incision infection. There were no cases of deep venous thrombosis. X-ray examinations did not show prosthetic loosening or displacement.
  
  
  CONCLUSIONS
  AS patients with bilateral hip ankylosis can be treated with cementless bilateral synchronous THA, which could greatly improve hip joint function without significant complications. The clinical effects proved to be satisfactory.
authors.affiliation: Department of Orthopaedics, The Affiliated Hospital of Guiyang Medical College, Guiyang, 550004, China, yechuanchina@hotmail.com.
authors.forename: Chuan
authors.initials: C
authors.lastname: Ye
authors.forename: Riguang
authors.initials: R
authors.lastname: Liu
authors.forename: Changying
authors.initials: C
authors.lastname: Sun
authors.forename: Jianhao
authors.initials: J
authors.lastname: Lin
authors.forename: Hu
authors.initials: H
authors.lastname: Li
authors.forename: Houxiang
authors.initials: H
authors.lastname: Re
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.forename: Qi
authors.initials: Q
authors.lastname: Sun
authors.forename: Long
authors.initials: L
authors.lastname: Yang
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods*; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000473:pathology / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D013167:Spondylitis, Ankylosing / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements