Retrograde Intramedullary Nail Fixation for Derotational Femoral Osteotomy for Recurrent Femoropatellar Instability

Figure 3

The enlarged image of the left knee of the full-length standing AP radiography before surgery (a) and enlarged image 8 months after surgery (b) are shown. Both were taken with 15° of internal rotation of the foot. The perimeter of the patella is highlighted in red, and the medialization of the patella due to the derotational osteotomy is observed.

(a)

(b)