Knee osteoarthritis (OA) is a usual problem in the elderly population, which treated with lifestyle modifications, non-steroidal anti-inflammatory drugs, physiotherapy, and intraarticular injections of corticosteroids/hyaluronic acid/autologous platelet-rich plasma (PRP) early stages, late surgical procedures, such as arthroscopic debridement, unicompartmental arthroplasty, patellofemoral total...