Fig. 3
a Preoperative radiograph of a 70-old-year man with subcapital femoral neck fractures. b Postoperative radiograph shows the excellent implant position of cementless bipolar hip arthroplasty. c A Vancouver type B fracture with stem loosening occurred after a fall at 2 months postoperatively. d Stem revision was performed using a long distal-fitting and modular-type stem with additional circular wiring. e At 24 months after revision surgery, the radiograph showed bony union and stable stem fixation