Introduction. Meta-analysis of studies shows that approximately 1/3 of patients with instability of acetabular components after primary hip arthroplasty have different grade of acetabular defects. The prevalence of hip revision arthroplasty is 7-18%. Aim of our study was to analyze the possibilities and effectiveness of acetabular defects restoration using bone grafting in hip revision arthroplasty. Material and methods. A descriptive study was performed in the period 2017-2022 on a group of 92 patients (100 hips) admitted to Department of Big Joints Replacement within the Clinical Hospital of Traumatology and Orthopedics from Chisinau. Patients underwent radiographic examination and computed tomography. Results. Acetabular defects were distributed according to the W. G. Paprosky Classification. Depending on the degree of the defect, the patients were distributed as follows: type I - 22 (18,9%), type II 48 (51.8%) and type III - 30 (29,1%). It should be noted that according to the Paprosky classification, good results were obtained in the treatment with allografts in all the types, notwithstanding the more advanced defects in the type II and III. Conclusion. These results suggest that despite the degree of acetabular bone deficit, we can obtain good results, even in type III, having at hand the technical possibility of bone grafting and the revision implant.