Related Experiment Video
Updated: Dec 28, 2025
04:19
Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device
Published on: November 8, 2024
1.0K
Comparison of Different Insertion Techniques for Lumbosacral Fixation Improvement: A Finite Element Study
1Department of Spinal Surgery, Shandong Province Hospital Affiliated to Shandong University, Jinan, China.
Orthopaedic Surgery
|February 21, 2020
Summary
A novel S1 cortical screw technique enhances lumbosacral fusion stability and safety. This method offers advantages over traditional pedicle screw fixation, protecting vital nerves and vessels.
Area of Science:
- Orthopedic Surgery
- Biomechanical Engineering
- Spinal Fusion Techniques
Background:
- Degenerative diseases of the lumbosacral spine require effective internal fixation.
- Traditional pedicle screw (PS) fixation and cortical screw fixation have limitations.
- Advancing screw trajectory techniques is crucial for improving surgical outcomes.
Purpose of the Study:
- To develop and evaluate a new S1 cortical screw trajectory technique.
- To provide a stronger theoretical foundation for clinical lumbosacral fixation.
- To enhance internal fixation technology for lumbosacral degenerative diseases.
Main Methods:
- Retrospective study of patients aged 40-70 undergoing intervertebral fusion.
- 3D reconstruction of lumbosacral lesions using CT data.
- Finite element (FE) analysis and Mimics software to simulate screw trajectories (PS, traditional cortical, new cortical).
Main Results:
- Cortical screws demonstrated superior stability and pullout force compared to pedicle screws.
- The new cortical screw (Model C) showed improved biomechanical performance over traditional cortical screws (Model B) in torsion and stress distribution.
- No significant differences in flexion/extension displacement or cage stress were noted between Model A and Model C.
Conclusions:
- The new S1 cortical screw technique is comparable to traditional cortical screw fixation.
- This novel method shows potential for promoting lumbosacral interbody fusion.
- The technique offers enhanced protection for adjacent vessels and nerves during surgery.
