Chang Hyeun Kim

Accuracy of Pedicle Screw Placement at the Cervicothoracic Junction (C7–T2) : A Comparative Study of O-arm Navigation versus C-arm Fluoroscopy

Objective: To compare pedicle screw accuracy at the cervicothoracic junction (CTJ; C7-T2) between O-arm navigation and C-arm fluoroscopy and identify level-specific malposition mechanisms through quantitative trajectory analysis. Methods: We retrospectively reviewed 187 screws in...