A. Clinical parameters: EQ-5D form (including VAS for pain and satisfaction) is filled in by the patients. Harris Hip Score is filled in by the examiner. SF-36 and activity scale (UCLA) is filled in by the patient. Patients also fill in a study specific form including questions about hip preferred and a pain drawing. Clinical parameters will be studied preoperative after 1, 2, 5, 7 and 10 years.