title: Hip arthroscopy versus open surgical dislocation for femoroacetabular impingement: A systematic review and meta-analysis.
abstract: BACKGROUND
  This meta-analysis aims to evaluate the efficacy and safety of hip arthroscopy versus open surgical dislocation for treating femoroacetabular impingement (FAI) through published clinical trials.
  
  
  METHODS
  We conducted a comprehensive literature search using PUBMED, EMBASE, and the Cochrane Central Register of Controlled Trials databases for relevant studies on hip arthroscopy and open surgical dislocation as treatment options for FAI.
  
  
  RESULTS
  Compared with open surgical dislocation, hip arthroscopy resulted in significantly higher Nonarthritic Hip Scores (NAHS) at 3- and 12-month follow-ups, a significant improvement in NAHS from preoperation to 3 months postoperation, and a significantly lower reoperation rate. Open surgical dislocation resulted in a significantly improved alpha angle by the Dunn view in patients with cam osteoplasty from preoperation to postoperation, compared with hip arthroscopy. This meta-analysis demonstrated no significant differences in the modified Harris Hip Score, Hip Outcome Score-Activities of Daily Living, or Hip Outcome Score-Sport Specific Subscale at 12 months of follow-up, or in complications (including nerve damage, wound infection, and wound dehiscence).
  
  
  CONCLUSIONS
  Hip arthroscopy resulted in higher NAHS and lower reoperation rates, but had less improvement in alpha angle in patients with cam osteoplasty, than open surgical dislocation.
authors.affiliation: Department of Orthopaedics, The People's Hospital of Guang'an City, Guangan Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: Dagang
authors.initials: D
authors.lastname: Zhang
authors.forename: Long
authors.initials: L
authors.lastname: Chen
authors.forename: Guanglin
authors.initials: G
authors.lastname: Wang
mesh_terms: D001182:Arthroscopy / Q000379:methods*; D057925:Femoracetabular Impingement / Q000601:surgery*; D006621:Hip Joint / Q000601:surgery*; D006801:Humans