Fig. 5

Method used to measure fragment displacement on lateral X-ray. On the left, dorsal displacement of the metatarsal head can be observed in a lateral X-ray of a Bösch osteotomy. On the right, the same X-ray with the displacement measurement. A line is drawn following the metatarsal diaphysis (continuous black line), which continues distal to the osteotomy (dashed line). A line perpendicular to the diaphyseal line is drawn (red line) from the start of the metaphyseal fragment (blue cross). This measures the distance between fragments