 The current study intends to examine whether that can be achieved equally good clinical results as with the conventional uncemented femoral component and bone mass in the upper end of the femur bone is preserved. Using a specific X-ray analysis RSA also assessed the stability between the prosthesis and bone. Both DEXA scan as RSA studies have routine examinations by Orthopaedic Surgery, Region Nordjylland, Klinik Farsø. 