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Related Experiment Video

Updated: Dec 9, 2025

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device
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Minimally invasive dynamic screw stabilization using cortical bone trajectory.

Chih-Chang Chang1,2,3, Chao-Hung Kuo1,2,3, Hsuan-Kan Chang1,2

  • 1Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Room 525, 17F, No. 201, Shih-Pai Road, Sec. 2, Beitou, Taipei, 11217, Taiwan.

BMC Musculoskeletal Disorders
|September 11, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a novel minimally invasive technique for dynamic screw stabilization using cortical bone trajectory (CBT) navigation. This approach offers a viable alternative to conventional methods, reducing muscle dissection and improving patient outcomes for spinal stenosis.

Keywords:
Cortical bone trajectory (CBT)Dynamic stabilizationMinimally invasive spine surgerySpondylolisthesis

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Area of Science:

  • Neurosurgery
  • Spinal Surgery
  • Minimally Invasive Procedures

Background:

  • Conventional pedicle-screw stabilization requires extensive dissection, compromising motion preservation.
  • Minimally invasive surgery is desired for dynamic stabilization procedures.
  • Existing dynamic stabilization methods may not fully preserve muscular function.

Purpose of the Study:

  • To report a novel method for minimally invasive dynamic screw insertion.
  • To evaluate the feasibility of cortical bone trajectory (CBT) for dynamic stabilization.
  • To present a mini case series of patients treated with this technique.

Main Methods:

  • Dynamic screws inserted via cortical bone trajectory (CBT) under spinal navigation.
  • Image-guided insertion combined with microscopic decompression.
  • Surgical procedures detailed with clinical data.

Main Results:

  • Four patients with L4-L5 spinal stenosis underwent the procedure.
  • Successful laminectomy and dynamic screw stabilization achieved through a single <3cm incision.
  • Significant improvement in back and leg pain reported post-surgery.

Conclusions:

  • Dynamic screw stabilization via CBT is a minimally invasive approach.
  • The technique avoids discectomy and interbody fusion, with minimal muscle dissection.
  • CBT offers a viable alternative to conventional pedicle-screw-based dynamic stabilization.