Fig. 2

a, b The pre-operative 2D CT images of a 73-year-old man showed type II odontoid fracture. c, d Percutaneous anterior odontoid screw fixation was failed on him, and percutaneous C1/2 transarticular screw fixation was performed as salvage technique. e, f Thirty-eight months after operation, no screw loose or breakage was observed. g, h Radiographic bony fusion was observed at odontoid fracture site, and bony fusion bridge was observed at the C1/2 lateral articular facet (g, arrow), with only about 10-mm skin scar (h, arrow)