Occipitocervical fusion as described by Dormans et al. A, Placement of burr holes. B, Corticocancellous graft obtained from iliac crest. C, Looped 16- or 18-gauge wires passed through burr holes and looped on themselves. Graft positioned into occipital trough and around spinous process of cervical vertebra at caudal extent of fusion and locked into place by precise contouring of bone. D, Wires crossed, twisted, and cut. SEETECHNIQUE 43.7.