Fig. 5From: Calculation of pediatric femoral fracture rotation from direct roentgenogramsThis example is more complicated because of casting and overlapping of fracture lines. According to the same principles, lines and points are drawn. Note that the intersection point of the proximal fracture line and proximal midline axis is overlapping with the distal fracture edge. α = sin−1(d/r), α = sin−1(6/32), α = 10.8°Back to article page