Fig. 1

Radiographs of a 61-year-old woman with rheumatoid arthritis of both hips and Dorr type C bone. a Preoperative radiographs reveals acetabular protrusions of both hips and the wide straightened stovepipe intramedullary canals combined with widened isthmus and thin cortices. b Immediate postoperative anteroposterior radiographs demonstrating the canal filling of the inserted femoral component. c, d Frog-leg lateral radiograph in the left side and right side. e Postoperative radiograph of both hips obtained 3 years after surgery shows that stem is solidly fixed in a satisfactory position in both hips