Using acetabular revision for loosening as an endpoint, investigators of this study found more than 90% acetabular component survival at 10 years among patients who underwent revision total hip arthroplasty for acetabular bone deficiency using a Kerboull-type acetabular reinforcement device to support hydroxyapatite granules and structural autograft.
Researchers retrospectively evaluated 37 patients who underwent the revision procedure for American Academy of Orthopaedic Surgeons type II and III acetabular defects. Patients had a minimum follow-up of 10 years and a mean follow-up of 12.8 years.
At 3 weeks, 6 months, 1 year and annually after arthroplasty, researchers evaluated patients’ radiologic outcomes and assessed implant migration using radiographs. Immediately after the procedure and at the final follow-up, researchers assessed the gap from the teardrop and device hook.
According to radiologic results, five hips had radiologic failure, with additional revision surgery needed in two hips. At 10 years, the acetabular component survival rate using component revision for loosening as a marker for failure was 100% for type II defects and 94.8% for type III defects.
Mean Japanese Orthopaedic Association hips scores increased from 48 points preoperatively to 67.8 points at last follow-up. The mean bone defect size for type II defects was 10.1 mm and 17.1 mm for type III defects. The mean change in inclination angle overall was 1.7°, and the mean gap between the device and teardrop was 2 mm.
“Acetabular reconstruction with [hydroxyapatite] HA granules, structural autografts and a Kerboull-type acetabular reinforcement device provided satisfactory clinical and radiological results at 12.8 years postoperatively,” the researchers wrote. ‒ by Monica Jaramillo
Disclosures: Kim reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.