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Related Experiment Videos

Template guided cervical pedicle screw instrumentation.

Mazda Farshad1, José Miguel Spirig1, Elin Winkler1

  • 1University Spine Center Zürich, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.

North American Spine Society Journal
|May 23, 2022
PubMed
Summary
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Patient-specific 3D-printed templates offer accurate cervical pedicle screw placement for spinal fusion. This European study found 95.3% of screws were fully contained within the pedicle, ensuring safety.

Area of Science:

  • Neurosurgery
  • Orthopedic Surgery
  • Medical Device Technology

Background:

  • Cervical pedicle screw instrumentation is biomechanically advantageous for spinal stabilization.
  • It presents technical challenges and risks of neurovascular injury.
  • Patient-specific templates (PSTs) show accuracy in thoracolumbar applications.

Purpose of the Study:

  • To evaluate the clinical accuracy of cervical pedicle screw placement using PSTs.
  • To report European experience with this technique.

Main Methods:

  • Retrospective analysis of 12 patients undergoing dorsal cervical spine instrumentation with 3D-printed PSTs.
  • Postoperative CT scans assessed pedicle perforation and screw deviation.
  • Surgical time, radiation exposure, blood loss, and complications were analyzed.
Keywords:
Cervical spinePatient-specific templatePedicle screwPedicle screw accuracyPedicle screw instrumentationThree-dimensional model

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Main Results:

  • 86 screws were inserted; 95.3% were fully contained within the pedicle.
  • All perforations (4.7%) were minor (<2 mm) and without neurovascular complications.
  • Median deviations: entry point 1.2 mm, trajectory 4.4° (Euler angle).

Conclusions:

  • Patient-specific 3D-printed templates are highly accurate for cervical pedicle screw placement.
  • This technique offers a safe and effective option for dorsal cervical instrumentation.