Fig. 3

C1-C2 intra-articular screw fixation with a titanium mesh cage: an 80-year-old female with an odontoid fracture. a Lateral view on a plain radiograph before surgery. b Lateral view on a plain radiograph immediately after surgery. An intra-articular screw was inserted into the atlantoaxial joint. Hook-and-rod fixation was applied to the posterior region. c Anterior view on a plain radiograph immediately after surgery. The region between the posterior arch of the C1 vertebra and the lamina of the C2 vertebra was filled with a titanium cage and grafted bone. White arrow: the intra-articular screw in the atlantoaxial joint