Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13018-021-02254-3/MediaObjects/13018_2021_2254_Fig6_HTML.png)
Coronal and sagittal views of radiographs in a same patient at 2 weeks (a, b), 6 years (c, d), and 11 years (e, f) postoperatively. Radiolucent lines (black arrows) were identified 6 years after surgery, but these were not progressive in nature and migration of the components was not observed