Related Experiment Video
Updated: Jun 16, 2026

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
Published on: January 6, 2023
Poly-axial screw removal
1Ondokuz Mayis University, Neurosurgery, Samsun, Turkey. aykanulus@gmail.com
Abstract:
As the use of instrumentation in spinal surgery has become common, the need for revision surgery has increased. During revision surgery one of the most difficult steps is removal of poly-axial pedicle screws, especially if no suitable revision set is available. We describe here an easy method for poly-axial screw removal. Leaving or placing a small piece of rod, attached firmly by a nut, tightens the head of the poly-axial screw. It can no longer move freely from the distal part of the screw and the screw can be removed by turning it counterclockwise with a big clamp or needle driver, which is available in almost every surgery set.
More Related Videos
Related Concept Videos
Self-Locking Screw
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Screw: Problem Solving
To evaluate the...
Frictional Forces on Screws
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
Net Torque Calculations
Upward Impending Motion
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
Eccentric Axial Loading in a Plane of Symmetry

