In revision total knee and hip arthroplasties, bone loss is one of the main problems that complicates surgical planning and directly affects implant survival. The increasing number of primary arthroplasty procedures, along with the rising frequency of revision surgeries, has made the effective and reliable management of bone defects even more crucial. Aseptic loosening, periprosthetic infection, and osteolysis are among the most common causes in revision arthroplasties. Accurate assessment and classification of bone loss plays a critical role in determining the appropriate reconstruction strategy. In knee arthroplasty, The Anderson Orthopaedic Research Institute (AORI) classification, and in hip arthroplasty, the Paprosky classifications, guide the surgical approach by defining the degree and localization of the defect. The morphology of the defect, the quality of the remaining bone stock, and patient- specific factors are decisive in the selection of the reconstruction technique. In moderate and intractable bone defects, metal blocks offer predictable solutions that support implant stability. In advanced metaphyseal bone loss, metaphyseal sleeve and cone systems provide reliable biological fixation due to their large contact surface area. In large and complex defects, trabecular metal blocks and conical structures offer advantages in terms of both primary mechanical stability and long-term implant survival due to their high porosity and osseointegration capacity. In recent years, three-dimensional printing technologies, personalized implant designs, and biological surface modifications have opened new horizons in the management of bone loss in revision arthroplasty. However, there is no single universal solution; treatment selection should be individualized according to the defect type and patient characteristics. In this review, metal support blocks, metaphyseal sleeves, and trabecular metal techniques used in the evaluation and management of bone loss in revision joint arthroplasties are discussed in light of current literature, and a practical framework for clinical application is presented.