THA revision with retention of acetabular component offers good outcomes
In hips with an appropriately positioned, well-fixed acetabular component, revision total hip arthroplasty with retention of the acetabular component was associated with good outcomes, according to study results.
Researchers performed revision total hip arthroplasty (THA) with retention of the acetabular component on 100 hips of 100 patients with osteolysis, polyethylene wear or femoral component loosening. Prevision radiographs were used to measure acetabular component inclination and anteversion and were categorized according to predetermined positional safe zones.
The researchers reviewed operative reports for femoral head size, polyethylene liner type, liner insertion technique, whether the patient had revision of the entire femoral component and use of bone graft. Outcomes included Harris Hip Score, UCLA activity score, episodes of instability and need for repeat revision.
A significant improvement from preoperative Harris Hip and UCLA activity scores was seen at an average of 6.6 years postoperatively. The researchers found a failure rate of 13%, and postoperative instability was noted in 6% of patients. A higher rate of failure was found in hips where the acetabular component was outside of the safe zone for inclination.
An increased rate of repeat revision was also associated with use of conventional polyethylene at the time of revision rather than highly cross-linked, according to study results.
Disclosure: The authors have no relevant financial disclosures.