C1–C2 pedicle screw placement was achieved satisfactorily in all the patients and their neck pain was greatly relieved.
Plain radiography and CT scans indicated solid fusion after 12 months in all the patients.
Sixty-three percent of the patients who presented with neurological symptoms reported improvement after surgery.
C1–C2 pedicle screw internal fixation is a reliable method for treating atlantoaxial instability.