AS1-247 TRABECULAR METAL FOR ACETABULAR DEFECTS IN HIP REVISION SURGERY. SHORT TERM CLINICAL AND RADIOGRAPHIC EVALUATION

Introduction/objectives: Trabecular Metal (TM) acetabular implants provide a potential solution for dealing with significant acetabular bone loss in hip revision surgery. The aim of this study was to assess the early clinical and radiological outcome of acetabular revision using TM cups and augments for acetabular reconstruction. Methods: The study included 32 consecutive patients with failed acetabular components after total hip arthroplasty. All patients underwent revision surgery using a TM acetabular shell, whereas in 10 cases augments were associated and 3 cases required cages. All patients had conventional radiographs of the pelvis and the hip in both preoperative and follow-up evaluations and were clinically evaluated according to WOMAC and HHS scores at 1 month, at 6 months and then at 1 year. Radiological evaluation investigated, with OsiriX v. 7.0, the restore of hip centre of rotation (COR) and signs of radiolucent lines and loosening. All statistical analyses were performed using SPSS Version 14.0. Statistical significance was set at p values of <0.05. Results: Mean age at the time of surgery was 69.5 years. Median follow up was 18 months (12-24 months). At last follow-up, 21 patients showed excellent results according to the WOMAC and HHS score and significant improvement (p<0.01), whereas 11 patients showed limitation in gait and function. COR was restored in 87% of cases (p<0.01). The acetabular components and augments appeared osteointegrated, and no sign of loosening were found. Conclusions: Based on these early clinical and radiological results, TM acetabular components and augments for acetabular defects (Paprosky II and III) appear to be a promising solution reducing the need of bone grafting. Our experience reflects early results reported in published studies.