Fig. 1From: Clinical and radiologic outcomes in patients undergoing primary total hip arthroplasty with Collum Femoris Preserving stems: a comparison between the direct anterior approach and the posterior approachCharacteristics of CFP prostheses. a. The geometry of the collum femoris-preserving stem (Waldemar-Link, Hamburg, Germany) can be characterized as a curvature design and self-anteversion. b. Postoperative anteroposterior and lateral radiographs of a 57-year-old female with left osteonecrosis of the femoral head. c. The osteotomy position of CFP stem is indicated by the solid line, and the traditional neck resection stem is indicated by the dotted line. The femoral neck between these two lines is preserved during hip arthroplasty when the CPF stem is implantedBack to article page