Robotic-Assisted Pedicle Screw Placement in Spine Surgery

Robotic-assisted pedicle screw placement represents a significant advance in spinal instrumentation, combining preoperative planning, real-time imaging and automated guidance to enhance precision and safety. Systems typically integrate a three-dimensional model of patient anatomy—derived from CT or intraoperative imaging—with a robotic arm that aligns a drill guide or screw driver along a preplanned trajectory. The surgeon retains full control of critical steps, while the robot ensures adherence to the intended path, reducing the risk of cortical breach and neurovascular injury. Globally, this approach has been adopted in diverse clinical settings, from simple degenerative fusions to complex deformity corrections, and has demonstrated reductions in screw-related complications, revision rates and intraoperative radiation exposure. Ongoing refinements in registration methods, haptic feedback and machine-learning-driven planning promise further improvements in workflow efficiency and outcomes.

Research from Nature Portfolio

Recent studies have provided a detailed comparison of radiation exposure and accuracy across different guidance modalities. One investigation measured dosimetric profiles in thoracolumbar fusion, showing that image-guided navigation yielded about three times the patient dose of fluoroscopy, yet markedly reduced radiation to the surgeon—permitting a far greater caseload before reaching annual exposure limits. These findings underscore the importance of protective protocols, especially for high-volume spine teams. Another analysis in adult degenerative scoliosis compared a spine robot with drill-guide templates and CT-based navigation, finding that the robotic approach achieved over 91 percent perfect screw placement (versus 81–84 percent for other modalities) and clinically acceptable accuracy in 96 percent of cases. In addition to superior accuracy, the robot group exhibited the lowest intraoperative radiation dose, illustrating a clear trade-off between procedural time and imaging burden.

Robotic-Assisted Pedicle Screw Placement in Spine Surgery publication trend

The graph below shows the total number of articles in robotic-assisted pedicle screw placement in spine surgery across all publications each year (not limited to Nature Index journals).

Technical terms

Pedicle screw: A threaded implant inserted through the vertebral pedicle into the vertebral body to stabilise spinal segments.

Robotic-assisted surgery: A technique in which robotic devices guide instruments along preplanned trajectories under surgeon supervision.

Navigation system: An imaging-based platform that registers patient anatomy to surgical space, enabling real-time instrument tracking.

Fluoroscopy: Continuous X-ray imaging used intraoperatively to visualise anatomical structures and verify implant placement.

Gertzbein and Robbins classification: A grading system for pedicle screw accuracy based on deviation from the pedicle cortex (Grade A = ideal; Grades B–E indicate increasing breach).

References

1. Assessing the Intraoperative Accuracy of Pedicle Screw Placement by Using a Bone-Mounted Miniature Robot System through Secondary Registration. PLOS ONE (2016).
2. Radiation Exposure of Patient and Operating Room Personnel by Fluoroscopy and Navigation during Spinal Surgery. Scientific Reports (2019).
3. Radiological and clinical differences among three assisted technologies in pedicle screw fixation of adult degenerative scoliosis. Scientific Reports (2018).
4. Robotic-assisted navigated minimally invasive pedicle screw placement in the first 100 cases at a single institution. Journal of Robotic Surgery (2019).
5. Pedicle screw accuracy assessment in ExcelsiusGPS® robotic spine surgery: evaluation of deviation from pre-planned trajectory. Chinese Neurosurgical Journal (2018).