Acetabular Reconstructions with Impaction Bone-Grafting and a Cemented Cup in Patients Younger Than 50 Years of Age: A Concise Follow-up, at 27 to 35 Years, of a Previous Report

We present an update of 19 acetabular reconstructions, performed with a cemented total hip arthroplasty and impaction bone-grafting, in situ at the time of our previous report. At a mean follow-up of 30 years (range, 27 to 35 years), no additional patients were lost to follow-up. Two patients (3 reconstructions) died for reasons unrelated to the hip surgery. Five reconstructions (5 patients) were revised, 4 for aseptic loosening and 1 for septic loosening, after a mean of 24 years (range, 22 to 27 years), leaving 11 surviving hips (11 patients) that were clinically and radiographically evaluated. Kaplan-Meier survival at 30 years was 0.40 (95% confidence interval [CI], 0.23 to 0.56) for revision for any reason, 0.56 (95% CI, 0.35 to 0.73) for aseptic loosening, and 0.53 (95% CI, 0.33 to 0.69) for radiographic loosening. Competing risk analysis showed that Kaplan-Meier analysis overestimates the revision risk by 18% for revision for any reason and 22% for aseptic loosening. Cemented impaction bone-grafting is a reasonable long-term solution for demanding primary and revision acetabular reconstructions in young patients with acetabular bone defects. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.