Introduction. Porous tantalum is an alternative metal for total joint arthroplasty components that offers several unique properties. Its high volumetric porosity (70% to 80%), low modulus of elasticity , and high frictional characteristics make it conducive to biologic fixation. Because of its bioactive nature and ingrowths properties, tantalum is used in primary as well as revision total hip arthroplasty components, with good to excellent early clinical results. In revision arthroplasty, standard and custom augments may serve as a structural bone graft substitute. The early results with trabecular metal acetabular components are promising but longer follow-up is required. The trabecular metal acetabular system is a true help for a surgeon in revision of hip arthroplasty due to the higher propensity of bony ingrowths than traditional porous coatings we present the early results of twelve cases where we used trabecular metal system for acetabular component. Objectives: The purpose of this study was to evaluate the outcome of trabecular metal acetabular components used in revision hip arthroplasty with medium and major bone defects. Methods: Since 2008, 12 patients in our clinic were operated with trabecular metal acetabular components,10 of them as a revision hip procedure, 2 of them after severe displaced acetabular fracture. The average of age of the patients was 58 years. 6 patients had trabecular metal shells with cemented liners. In 3 patients we used trabecular metal augments with cemented cups, and another 3 patients were used augments together with trabecular shells. All patients were evaluated before and after surgery with standard X-ray and Harris hip score, and in some cases with CT of the hip. Acetabular defects were evaluated according to Paprosky 2B-3 cases 2C-3cases 3A5cases 3B-1case. Results: Average follow up was 18 months, 100% follow up was achieved. There were no complications directly related to the acetabular surgery. There were no revisions, no trombembolic complication. There are no progressive radiolucencies or detectable migration in any of the cups. There were no dislocations. Conclusion: In our clinic we just started to use this system but these early results showed us that trabecular metal acetabular components may be used with grate confidence in hip revision surgery and show very good results in time. The two-piece acetabular shell and augments permits the reconstruction of every acetabular bone defect.