Research Article

Accuracy and Safety of Robot-Assisted versus Fluoroscopy-Guided Posterior C1 Lateral Mass and C2 Pedicle Screw Internal Fixation for Atlantoaxial Dislocation: A Preliminary Study

Table 3

Accuracy of the screw position according to the grading system.

Grade 0Grade IGrade IIGrade III

FH group
 C1LMS (28 screws)21421
 C2PS (28 screws)20431
 Total (56 screws)41852
 Accuracy rate (%)73.214.38.93.6
RA group
 C1LMS (22 screws)18310
 C2PS (22 screws)19120
 Total (44 screws)37430
 Accuracy rate (%)84.19.16.80