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• W2034759433 abstract "In Brief Study Design. Randomized laboratory cadaver study. Objective. The objective of this study was to determine the accuracy of anterior transpedicular screw placement in the cervical spine using conventional fluoroscopy versus computer-assisted navigation. Summary of Background Data. Traditionally, global cervical instability has required anterior and posterior fixation due to the superior biomechanical stability of circumferential constructs. Anterior transpedicular screws (ATPS) have recently been advocated as a single surgical approach. Current clinical publications report using fluoroscopic guidance for screw placement. Computer-assisted navigation (CAN) systems have demonstrated enhanced accuracy of pedicle screw placement at all spine levels but have not been assessed for ATPS. Methods. The anterior vertebrae of 9 fresh frozen cadaver cervical spines were exposed, preserving the lateral and posterior soft tissue envelope. Nine practicing spine surgeons placed 2.0-mm titanium anterior transpecidular Kirschner wires into the C3-T1 pedicles bilaterally using fluoroscopy or CAN guidance. Specimens were imaged by computed tomography and virtual screws were overlaid on the K-wires. Targeting accuracy was compared between the 2 techniques in all planes using a 5-level grading scale. Results. The percentage of acceptable screw placements for fluoroscopy and CAN was 42.6% and 66.7%, respectively (P = 0.012). Catastrophic screw placement (grade 3 or 4) was 33.3% for fluoroscopy and 16.7% for CAN. In the multivariable model, the accuracy rate was 67% lower for fluoroscopy than for CAN after controlling for other factors (odds ratio: 0.33, 95% confidence interval: 0.14–0.79). Conclusion. The accuracy of CAN-guided placement of K-wires for ATPS was superior to placement under fluoroscopic guidance, demonstrating statistically more acceptable screw placements and significantly less catastrophic virtual screws. However, malposition was still high, with potential for vertebral artery and neurological injury in a clinical setting. Further advancement in current ATPS techniques is warranted prior to widespread implementation in a patient setting. Level of Evidence: N/A The objective of this study was to determine the accuracy of anterior transpedicular screw placement in the cervical spine cadavers using conventional fluoroscopy versus computer-assisted navigation. The accuracy of computer-assisted navigation for anterior transpedicular screw placement demonstrated statistically more acceptable and significantly less catastrophic screw placements than fluoroscopic guidance." @default.
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• W2034759433 date "2015-04-01" @default.
• W2034759433 modified "2023-09-26" @default.
• W2034759433 title "Accuracy of Fluoroscopy Versus Computer-Assisted Navigation for the Placement of Anterior Cervical Pedicle Screws" @default.
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• W2034759433 doi "https://doi.org/10.1097/brs.0000000000000786" @default.
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