Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12891-018-2385-z/MediaObjects/12891_2018_2385_Fig3_HTML.png)
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