C1–C2 Posterior Pedicle/Screw Fixation and Fusion (Harms/Magerl)

It is mostly considered for atlantoaxial instability or recurrent subluxation, seen in trauma, congenital anomalies, odontoid dysplasia, inflammatory diseases, etc., accompanied by nerve compression or pain. The decision is usually based on the degree of instability and the extent of compression shown by imaging (dynamic X-rays, CT, MRI), the response to previous conservative/immobilization treatment, neurological function status, and bone conditions. Whether corresponding screws can be inserted and whether decompression needs to be combined is assessed by a specialist team.