Retrospectively study reviewing 34 patients operated with dual mobility cups in total hip arthroplasty between January 2009 and June 2012 at Sundsvall Hospital.~Indications for surgery is recurrent dislocation or patients at risk for dislocation after total hip arthroplasty suffering osteoarthritis or femoral neck fracture.~Patients are followed recording complications, reoperations, functional outcome (Harris hip score and EQ5D) in june 2012.
Retrospectively study reviewing 34 patients operated with dual mobility cups in total hip arthroplasty between January 2009 and June 2012 at Sundsvall Hospital.~Hypothesis: The dual mobility socket reduce the rate of dislocation in patient at high risk but increase the incidence of postoperative infection.