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Updated: Oct 2, 2025
07:10
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
Published on: June 12, 2020
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Historical Note: The Evolution of Cortical Bone Trajectory and Associated Techniques.
Sihyong J Kim1,2, Ralph J Mobbs1,3, Pragadesh Natarajan1,3
1NeuroSpine Surgery Research Group, Sydney, Australia.
Spine Surgery and Related Research
|February 28, 2022
Summary
Cortical bone trajectory (CBT) offers superior screw fixation strength and stability compared to traditional methods. This surgical technique also minimizes invasiveness, reducing patient injury and operative time.
Area of Science:
- Spinal surgery
- Orthopedic biomechanics
Background:
- Cortical bone trajectory (CBT) is an alternative posterior fixation technique for pedicle screws.
- It differs from traditional trajectories in its medio-lateral and caudo-cephalad path.
Purpose of the Study:
- To provide a historical review of the development of the CBT surgical technique.
- To highlight key milestones and explain the increasing popularity of CBT.
Main Methods:
- Historical review of scientific literature.
- Analysis of biomechanical, morphometric, and clinical evidence.
- Examination of advancements in neuronavigational technology.
Main Results:
- CBT demonstrates superior pullout strength and mechanical stability over traditional pedicle screw trajectories.
- CBT requires a smaller surgical field, leading to reduced tissue injury, operative time, and blood loss.
- The technique's evolution is driven by patient outcomes, technology, and accumulating evidence.
Conclusions:
- CBT represents a significant advancement in posterior spinal fixation.
- Its biomechanical advantages and clinical benefits contribute to its growing adoption in spine surgery.
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