Fig. 3From: Sacral osteotomy combined with triangular osteosynthesis in the treatment of malunion and nonunion of vertically displaced pelvic fracturesSchematic diagram for sacral osteotomy of the posterior pelvic ring. a Sacrotuberous ligament (red arrow). b Location of the sacral osteotomy (red line) and incised sacrotuberous ligament (blue line). c Schematic of the surgeon crossing the greater sciatic notch with the index finger to probe the anterior surface of the sacrum (red arrow)Back to article page