The Elderly Hip Patient The proportion of elderly in the Danish population is increasing and their and functional level is generally good, despite other health problems, which intensifies the demand for a primary definitive (one-stage) and safe surgical treatment in case of osteoarthritis or fragility low-energy displaced femoral neck fracture. Total hip arthroplasty (THA) is one of the most successful procedures in modern orthopaedic surgery to achieve pain relief and restore normal walking ability in a preoperative painful and stiff hip joint.