• M J Parker and H Pervez.
• Orthopaedic Department, Peterborough District Hospital, Thorpe Road, Peterborough, Cambridgeshire, UK, PE3 6DA. mjparker@doctors.org.uk
• Cochrane Db Syst Rev. 2002 Jan 1 (3): CD001707.

BackgroundThe operation of insertion of a hemiarthroplasty to the hip refers to replacement of the femoral head with a prosthesis, whilst retaining the natural acetabulum and acetabular cartilage. The main surgical approaches to the hip for insertion of the prosthesis can be broadly categorised as either 'anterior' via the anterior joint capsule, or 'posterior' through the posterior joint capsule.ObjectivesTo evaluate, based on evidence from randomised controlled trials, the effects of different surgical approaches for the insertion of a hemiarthroplasty to the hip has on clinical outcomes.Search StrategyWe searched the Cochrane Musculoskeletal Injuries Group specialised register (up to February 2002). Articles of all languages were considered.Selection CriteriaAll randomised controlled trials comparing insertion of a hemiarthroplasty by different surgical approaches.Data Collection And AnalysisBoth reviewers independently assessed trial quality, using a 10 item scale, and extracted data. Wherever appropriate and possible, the data are presented graphically.Main ResultsOne randomised trial was identified involving 114 patients. The trial had poor methodology (particularly in susceptibility to selection bias), inadequate follow-up of patients who withdrew, and there was limited reporting of results. Medical complications and mortality from six months to two years appeared greater in the posterior group; this difference in mortality, within the structure of the poor methodology, was statistically significant. No other differences were claimed to be significant.Reviewer's ConclusionsThere is currently insufficient evidence from randomised trials to determine the optimum surgical approach for insertion of a hemiarthroplasty to the hip.

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