Accuracy of Pedicle Screw Placement in Scoliosis Surgery: A Comparison between Conventional Computed Tomography-Based and O-Arm-Based Navigation Techniques

Study DesignRetrospective study.PurposeWe compared the accuracy of O-arm-based navigation with computed tomography (CT)-based navigation in scoliotic surgery.Overview of LiteratureNo previous reports comparing the results of O-arm-based navigation with conventional CT-based navigation in scoliotic surgery have been published.MethodsA total of 222 pedicle screws were implanted in 29 patients using CT-based navigation (group C) and 416 screws were implanted in 32 patients using O-arm-based navigation (group O). Postoperative CT was performed to assess the screw accuracy, using the established Neo classification (grade 0: no perforation, grade 1: perforation <2 mm, grade 2: perforation ≥2 and