Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Frictional Forces on Screws01:17

Frictional Forces on Screws

1.2K
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...
1.2K
Self-Locking Screw01:16

Self-Locking Screw

1.6K
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.
1.6K
Screw: Problem Solving01:21

Screw: Problem Solving

415
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...
415
Upward Impending Motion01:21

Upward Impending Motion

295
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...
295
Pivot Bearings01:23

Pivot Bearings

1.3K
In mechanical systems, bearings are crucial in facilitating relative motion between two components while minimizing friction and wear. They help distribute various loads (radial, axial or a combination of both loads) across machinery parts, ensuring smooth and efficient operation.
A pivot bearing is a specialized type of bearing designed to support axial loads on a rotating shaft. The bearing surface, or the pivot, is positioned at the end of a shaft to support the axial thrust. The pivot may...
1.3K
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

273
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
273

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Extraction of broken intramedullary nails using olive-tipped guidewire and mini fragment screws.

Journal of orthopaedic trauma·2026
Same author

The role of cannabis-based medicinal products (CBMPs) in managing osteoarthritis symptoms: a scoping review of current evidence and future directions.

Clinical rheumatology·2026
Same author

Regional oximetry for diagnosing compartment syndrome: a scoping review.

Journal of orthopaedic surgery and research·2026
Same author

Efficacy of Vein of Marshall Ethanol Infusion in Persistent Atrial Fibrillation Ablation: A Meta-Analysis of RCTs.

Pacing and clinical electrophysiology : PACE·2026
Same author

The outcomes of acetabular impaction bone grafting using allografts in uncemented cups for acetabular bone loss: a systematic review and meta-analysis.

Musculoskeletal surgery·2025
Same author

Evaluation of Suspected Achilles Tendon Rupture Managed Through Virtual Fracture Clinic Pathway in Busy Major Trauma Centre.

Cureus·2025

Related Experiment Video

Updated: Jun 29, 2025

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device
04:19

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Published on: November 8, 2024

411

The evolution of poller screws.

Andrew Kailin Zhou1,2, Eric Jou3, Victor Lu1,4

  • 1Department of Trauma and Orthopaedics, Addenbrookes Major Trauma Unit, Cambridge University Hospitals, United Kingdom.

EFORT Open Reviews
|April 5, 2024
PubMed
Summary
This summary is machine-generated.

Poller screws offer a simple, minimally invasive method for fixing metaphyseal fractures alongside intramedullary nailing. This review clarifies their historical use and proposes a new classification system for these blocking screws.

Keywords:
intramedullary nailspoller screw

More Related Videos

An Anesthesia, Surgery, and Harvest Method for the Evaluation of Transpedicular Screws Using an In Vivo Porcine Lumbar Spine Model
09:07

An Anesthesia, Surgery, and Harvest Method for the Evaluation of Transpedicular Screws Using an In Vivo Porcine Lumbar Spine Model

Published on: May 31, 2017

7.6K
Twin-Screw Extrusion Process to Produce Renewable Fiberboards
07:21

Twin-Screw Extrusion Process to Produce Renewable Fiberboards

Published on: January 27, 2021

6.4K

Related Experiment Videos

Last Updated: Jun 29, 2025

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device
04:19

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Published on: November 8, 2024

411
An Anesthesia, Surgery, and Harvest Method for the Evaluation of Transpedicular Screws Using an In Vivo Porcine Lumbar Spine Model
09:07

An Anesthesia, Surgery, and Harvest Method for the Evaluation of Transpedicular Screws Using an In Vivo Porcine Lumbar Spine Model

Published on: May 31, 2017

7.6K
Twin-Screw Extrusion Process to Produce Renewable Fiberboards
07:21

Twin-Screw Extrusion Process to Produce Renewable Fiberboards

Published on: January 27, 2021

6.4K

Area of Science:

  • Orthopedic Surgery
  • Trauma Surgery
  • Biomedical Engineering

Background:

  • Poller screws are adjuncts for intramedullary nailing of metaphyseal fractures.
  • They are technically simple, practical, minimally invasive, and do not require specialized instruments.
  • Historical use and evolving understanding have led to varied opinions on their effectiveness.

Purpose of the Study:

  • To provide a historical perspective on poller screws.
  • To propose a novel classification system for poller screws.
  • To explore a new technique and the potential fourth generation of poller screws.

Main Methods:

  • Non-systematic literature search on PubMed using "Poller screw" and "Blocking screw".
  • Follow-up on relevant references from identified primary studies.
  • Historical analysis and synthesis of existing evidence.

Main Results:

  • Poller screws were first termed in 1999 as aids for metaphyseal fracture union during intramedullary nailing.
  • Evidence regarding their true effectiveness has been inconsistent, leading to divided opinions.
  • A novel classification of poller screws over time has been developed.

Conclusions:

  • There is a current paucity of research specifically focusing on poller screws.
  • Existing research shows confusion and a need for a more organized approach to classifying their use.
  • A structured classification is suggested to better understand and utilize poller screws in orthopedic practice.