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Related Experiment Video

Updated: Feb 21, 2026

A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
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Pedicle Screw Insertion Accuracy Using O-Arm, Robotic Guidance, or Freehand Technique: A Comparative Study.

Pietro Aniello Laudato1, Katarzyna Pierzchala2, Constantin Schizas3

  • 1Spine Unit, Département des Neurosciences Cliniques, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.

Spine
|October 12, 2017
PubMed
Summary
This summary is machine-generated.

New technologies like O-Arm navigation and robotic assistance do not significantly improve pedicle screw accuracy compared to freehand techniques. Spinal fellows achieve similar accuracy to senior surgeons under supervision.

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Area of Science:

  • Spine surgery
  • Surgical navigation technologies
  • Radiological imaging

Background:

  • Pedicle screw insertion is crucial for spinal stabilization.
  • O-Arm navigation and robotic assistance are increasingly used for pedicle screw placement.
  • Direct comparisons between these advanced techniques and traditional methods are limited.

Purpose of the Study:

  • To compare the accuracy of pedicle screw insertion using O-Arm navigation, robotic assistance, and freehand fluoroscopic techniques.
  • To evaluate the impact of different navigation methods on screw placement precision.

Main Methods:

  • Retrospective analysis of 569 pedicle screws implanted in 84 patients.
  • Screws were placed using robotic assistance (11 patients), O-arm navigation (25 patients), or freehand fluoroscopy (48 patients).
  • Screw accuracy was assessed postoperatively using CT scans based on Rampersaud criteria by two independent observers.

Main Results:

  • No statistically significant difference in screw accuracy was found between the three groups.
  • Completely intrapedicular screw placement (Grade A) rates were: 78.8% (robotic), 69.6% (O-arm), and 70.4% (freehand).
  • Misplacement rates (Grades C&D) were low and similar across groups (4.7% robotic, 4.2% O-arm, 6.4% freehand).

Conclusions:

  • Current advanced navigation technologies do not significantly alter pedicle screw insertion accuracy in this study's context.
  • Spinal fellows demonstrated comparable accuracy to experienced surgeons when using these techniques under supervision.
  • Further research is needed to assess other potential benefits (e.g., radiation exposure, efficiency) of newer technologies.