Related Experiment Video
Updated: Jun 16, 2026
05:57
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
Central European Neurosurgery
|February 6, 2010
Summary
Revision spinal surgery often requires removing poly-axial pedicle screws. This easy method uses a rod piece and nut to secure the screw head, enabling simple counterclockwise removal with standard surgical tools.
Area of Science:
- Spinal Surgery
- Orthopedic Instrumentation
- Surgical Techniques
Background:
- Instrumentation in spinal surgery is increasingly common, leading to a rise in revision surgeries.
- Removal of poly-axial pedicle screws during revision surgery can be challenging, particularly without specialized revision sets.
Purpose of the Study:
- To describe an easy and accessible method for removing poly-axial pedicle screws during spinal revision surgery.
Main Methods:
- A novel technique involving a small rod piece and a nut is employed.
- The rod piece and nut are used to secure the head of the poly-axial screw.
- This stabilization prevents free movement of the screw head from the distal screw portion.
Main Results:
- The described method effectively immobilizes the poly-axial screw head.
- Immobilization allows for straightforward removal of the screw by counterclockwise rotation.
- The technique utilizes commonly available surgical instruments like large clamps or needle drivers.
Conclusions:
- This technique offers a simple, practical solution for poly-axial pedicle screw removal in revision spinal surgery.
- It addresses the challenge of screw removal when specialized revision instrumentation is unavailable.
- The method enhances surgical efficiency and accessibility by using standard surgical tools.
More Related Videos
Related Concept Videos
01:16Self-Locking Screw
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
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.
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.
01:21Screw: Problem Solving
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
01:17Frictional Forces on Screws
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
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...
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...
01:19Net Torque Calculations
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to rotate...
01:21Upward Impending Motion
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
01:16Eccentric Axial Loading in a Plane of Symmetry
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.