Chun DH, et al. - Experts compared biomechanical stability imparted to the C1 and C2 vertebrae by the transarticular (TA), C1 lateral mass (LM)-C2 pedicle (PS), C1LM-C2 pars, and C1LM-C2 translaminar (TL) screw fixation techniques. As per the data, the most stable technique was C1LM-C2PS fixation. Based on the findings, surgeons have to be aware that additional fixation or postoperative immobilization may be required to achieve range of motion (ROM) restriction if they have to use other fixation methods besides the C2 pedicle screw. During follow-up imaging examinations (x-ray and computed tomography scan) after atlantoaxial fixation, careful observation at the maximum stress site on the screw including screw loosening, screw-bone interface disruption or screw fracture will be necessary.