“…Treatment options have continued to evolve for osteonecrosis and include potential nonoperative pharmacotherapies (such as anticoagulants, bisphosphonates, shockwave therapy, or hyperbaric oxygen) [5,6,16,17,23,24,43,52,68]; joint-preserving surgeries (core decompression and various vascularized and nonvascularized bone grafting procedures) [18,35,36]; and joint-replacing surgeries, including THA. Although numerous treatment algorithms have been proposed to provide guidance to the treating physician [18,19,45,58,64], controversy remains surrounding the most appropriate surgery and at what stage of the disease process these procedures should be performed [9,10,34,50,59,60].…”