Long-term Outcomes of AR-Assisted Pedicle Screw Placement in Spinal Fusion

Overview

This study evaluated 59 patients undergoing thoracolumbar spinal fusion with augmented reality (AR)-assisted pedicle screw placement, assessing long-term surgical outcomes and patient-reported physical and mental functioning. Results suggest AR-assisted surgery is feasible and safe, with improvements in disability and quality of life comparable to existing navigation techniques.

Background

Augmented reality (AR) technology overlays virtual elements onto the surgical field, enhancing visualization and navigation during spinal procedures. Pedicle screw placement is critical for thoracolumbar fusion stability but has variable accuracy with traditional methods. AR-assisted systems, such as the XVision head-mounted display, aim to improve screw placement accuracy while preserving tactile feedback. Despite demonstrated technical benefits, long-term clinical outcomes following AR-assisted spinal fusion have not been previously reported.

Data Highlights

Key Findings

• AR-assisted pedicle screw placement was successfully implemented in 59 consecutive thoracolumbar fusion patients during early adoption.
• Patient-reported outcomes showed improvements in Oswestry Disability Index (ODI) scores and SF-36 physical and mental component scores postoperatively.
• Surgical revision rates and postoperative complications were monitored, with no unexpected adverse events related to AR technology reported.
• AR technology preserved surgeon tactile feedback while providing real-time screw trajectory visualization, potentially enhancing placement accuracy.
• Retrospective collection of preoperative PROs introduces recall bias, acknowledged as a study limitation.

Clinical Implications

AR-assisted pedicle screw placement is a feasible and safe adjunct in thoracolumbar spinal fusion, potentially improving surgical accuracy without compromising tactile feedback. The observed improvements in patient disability and quality of life support the integration of AR technology into spinal instrumentation workflows. Clinicians should consider AR as a navigation tool that may enhance outcomes, though further controlled studies are warranted.

Conclusion

This study provides initial evidence that AR-assisted spinal fusion yields favorable long-term patient-reported outcomes and low revision rates, supporting its role as a valuable surgical adjunct. Continued evaluation will clarify its comparative effectiveness and broader clinical impact.

References

1. Augmedics, Inc. -- XVision AR System
2. Study IRB00265490 -- Retrospective Cohort on AR-Assisted Spinal Fusion