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Rapid prototype patient-specific drill template for cervical pedicle screw placement.

Brent D Owen1, Gary E Christensen, Joseph M Reinhardt

  • 1Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA

Computer Aided Surgery : Official Journal of the International Society for Computer Aided Surgery
|October 25, 2007
PubMed
Summary

This study demonstrates a novel drill template for accurate cervical pedicle screw placement. Patient-specific rapid prototyping ensures precise trajectory, showing promise for spinal surgery safety.

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Area of Science:

  • Spinal surgery
  • Orthopedic biomechanics
  • Medical device engineering

Background:

  • Cervical pedicle screw placement is critical for spinal stabilization.
  • Accurate trajectory is essential to avoid neurovascular injury.
  • Existing methods may have limitations in precision.

Purpose of the Study:

  • To evaluate the feasibility of a custom drill template for cervical pedicle screw insertion.
  • To assess the accuracy of screw placement using this templating technique.
  • To validate a rapid prototyping method for surgical guide creation.

Main Methods:

  • A cadaver cervical spine underwent volumetric CT scanning.
  • Computer software designed a patient-specific drill template for C5.
  • Rapid prototyping created the physical template for pilot hole drilling.

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Last Updated: Jul 10, 2026

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  • Post-drilling CT and dissection verified screw trajectory accuracy.

    • Main Results:

    • The patient-specific drill template technique was feasible.
    • Accurate pilot hole and pedicle screw placement were confirmed.
    • No cortical violations were observed during imaging or inspection.

    Conclusions:

    • Custom drill templates show promise for cervical pedicle screw placement.
    • This methodology offers an accurate technique and trajectory.
    • Rapid prototyping facilitates precise surgical guide fabrication.