Inclusion Criteria:  Hip osteoarthritis that is in X-ray pictures ≥2 in Kellgren - Lawrence classification Primary osteoarthritis Patients symptoms of hip osteoarthritis are so severe, that an experienced orthopedist would suggest total hip arthroplasty as a treatment  Exclusion Criteria:  Patients symptoms are so severe that total hip arthroplasty should be done within the next three months ASA > 3 (ASA physical status classification system) Normal contraindications to surgery Previous surgery to the same hip that has the osteoarthritis (including total hip arthroplasty, surgery for fracture, osteotomy, arthroscopy) The referring orthopedist has placed the patient in line for hip arthroplasty Secondary osteoarhritis