Results of displaced subcapital fractures treated by primary total hip replacement.

We present morbidity, mortality and functional outcome in mobile, socially independent and alert patients with displaced subcapital hip fractures, treated by primary total hip replacement (THR). Fifty-one consecutive socially independent and mentally alert patients with displaced subcapital fractures were treated by primary THR, from April 1997 to March 2000, at a single hospital. Most patients were female (45/51) with an average age of 74 years. Patient hospital records were reviewed and patients interviewed by telephone. Functional outcome was assessed using Oxford hip score (OHS), short form 12 (SF12), and patient satisfaction. This study had a mean follow-up of 33 months (range 20-54). One patient with early dislocation went on to have recurrent dislocations. Two patients underwent revision surgery. Three patients died within 1 year of sustaining fracture. Function was comparable to elective THR in osteoarthritic patients. OHS correlated well with both SF12 and patient satisfaction. This study has the lowest reported dislocation rate (2%) and an acceptable 1-year mortality (6%) confirming the place of primary THR in treatment of these selected patients with a displaced hip fracture. The OHS proved a valuable instrument to assess function following THR in fracture patients.