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Few revisions at long-term follow-up for cementless THA for osteonecrosis
Researchers have concluded that uncemented total hip arthroplasty results in 66 patients with osteonecrosis were maintained through 10 postoperative years.
“Results of this study demonstrate excellent durability of cementless [total hip arthroplasty] THA in patients with osteonecrosis of the femoral head at a minimum of 10-year follow-up,” John J. Callaghan, MD, and colleagues wrote in the study.
The investigators studied reasons for revision by evaluating radiographs signs of for loosening, osteolysis and wear, monitored patient activity with an accelerometer, and analyzed the patients’ WOMAC, Tegner activity, UCLA and Harris Hip Scores, according to the abstract.
Callaghan and colleagues compared implant results from this study to their previous report of 44 cemented THAs in patients with osteonecrosis who had a comparable follow-up.
At minimum 10-year follow-up, 10 hips in this series required revision. Loosening and revision were significantly lower in the cementless vs. the cemented THA group, according to the abstract.
Disclosure: One of the authors (Callaghan) receives royalties from Lippincott and Williams & Wilkins and is a consultant for and receives royalties from DePuy. One of the authors (Johnston) receives royalties from Zimmer.