Reasons for revision after total hip arthroplasty

[Objective]To analyze the failure mechanisms in patients undergoing revision surgery in different time after index total hip arthroplasty(THA).[Method]The clinical records and radiographs of 78 revision hip surgeries between June 1995 and June 2005 loere reviewed.Forty-two cases were total hip arthroplasty and 36 were hemiarthroplasty.Thirty-six patients had revision surgery within 5 years and 42 more than 5 years.[Result]The causes of early revision THA included infection(16 cases),aseptic loosening,acetabular erosion,and mechanical failure.In the late revision THA,aseptic loosening was the most common reason,and the next common reason were acetabular wear and osteolysis around a well-fixed implant.[Conclusion]Infection is a common reason for the early revision.Aseptic loosening is the major cause for the late revision total hip arthroplasty.