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Related Experiment Videos

Techniques and pitfalls of cervical lateral mass plate fixation.

A J Muffoletto1, A G Hadjipavlou, R E Jensen

  • 1Department of Orthopedics and Rehabilitation, University of Texas Medical Branch, Galveston, USA.

American Journal of Orthopedics (Belle Mead, N.J.)
|November 18, 2000
PubMed
Summary

Subaxial lateral mass fixation is effective, with 89% fusion rates. Optimal drilling techniques and monitoring reduce screw misplacement and complications, ensuring patient safety and successful outcomes.

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Area of Science:

  • Orthopedic Surgery
  • Neurosurgery
  • Spinal Surgery

Background:

  • Subaxial lateral mass fixation is a common surgical procedure for stabilizing the cervical spine.
  • Assessing screw placement accuracy and fusion rates is crucial for surgical success.

Purpose of the Study:

  • To evaluate the accuracy of screw placement and fusion rates in subaxial lateral mass fixation.
  • To identify factors associated with optimal screw placement and successful fusion.

Main Methods:

  • Retrospective review of 35 patients undergoing subaxial lateral mass fixation.
  • Analysis of postoperative computed tomography (CT) scans for screw trajectory and impingement.
  • Assessment of fusion rates at 2- to 3.5-year follow-up.

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Main Results:

  • 31% of screws (45/146) had suboptimal trajectory on CT scans.
  • Only 2 screws minimally impinged the foramen transversarium without adverse effects.
  • An overall fusion rate of 89% was achieved.

Conclusions:

  • Optimal drilling technique and trajectory are associated with improved screw placement and reduced complications.
  • Intraoperative somatosensory evoked potential monitoring aids in achieving good screw placement.
  • Bone grafting is linked to higher fusion rates in subaxial lateral mass fixation.