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

Self-Locking Screw01:16

Self-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.

You might also read

Related Articles

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

Sort by
Same author

Correction to: Surgical screening protocol for craniocervical instability secondary to ehlers-danlos syndrome and other connective tissue disorders: analysis of a 347 patient case series.

Neurosurgical review·2026
Same author

Anaesthetic management of obstetric patients with Chiari 1 malformation with or without syringomyelia: a multidisciplinary consensus statement from the Obstetric Anaesthetists' Association (OAA).

International journal of obstetric anesthesia·2026
Same author

Variation in rates of post-operative oncological treatment for patients with glioblastoma in England: a comprehensive multi-year National cohort study from the GlioCova project.

Journal of neuro-oncology·2026
Same author

Surgical screening protocol for craniocervical instability secondary to ehlers-danlos syndrome and other connective tissue disorders: analysis of a 347 patient case series.

Neurosurgical review·2026
Same author

Estimating post-operative complication rates in patients with primary brain tumours from routine administrative data: A national cohort study.

PloS one·2026
Same author

Adult glioblastoma in England: Incidence, treatment, and outcomes with novel population-based strata.

Cancer epidemiology·2025

Related Experiment Video

Updated: Jun 5, 2026

Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
07:11

Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants

Published on: May 23, 2020

How I do it: Condylar screws.

Paolo A Bolognese1,2, Andrew Brodbelt3, Mansoor Foroughi4

  • 1Chiari EDS Center, Division of Neurosurgery, Mount Sinai South Nassau, One Healthy Way, Oceanside, NY, USA. Paolo.Bolognese@mountsinai.org.

Acta Neurochirurgica
|April 23, 2026
PubMed
Summary
This summary is machine-generated.

Condylar screws offer reliable fixation for craniocervical fusion (CCF) when other methods fail. This technique is a valuable addition to current CCF procedures, especially for patients with connective tissue disorders.

Keywords:
Craniocervical fusionCraniocervical instabilityOccipital condyle

More Related Videos

C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position
12:25

C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position

Published on: September 16, 2022

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
05:57

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique

Published on: January 6, 2023

Related Experiment Videos

Last Updated: Jun 5, 2026

Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants
07:11

Treatment of Facial Deformities using 3D Planning and Printing of Patient-Specific Implants

Published on: May 23, 2020

C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position
12:25

C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position

Published on: September 16, 2022

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique
05:57

A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique

Published on: January 6, 2023

Area of Science:

  • Neurosurgery
  • Orthopedic Surgery
  • Spinal Fusion Techniques

Background:

  • Condylar screws expand fixation options for craniocervical fusion (CCF).
  • They are indicated when occipital anchorage is insufficient.
  • Potentially superior to barplate constructs in connective tissue disorders.

Purpose of the Study:

  • To evaluate the efficacy and reliability of condylar screws in CCF.
  • To describe the surgical technique for condylar screw placement.
  • To assess the utility of condylar screws as an adjunct to CCF.

Main Methods:

  • Surgical dissection of condyles, sacrificing the Posterior Condylar Emissary Vein.
  • Screw entry 3 mm lateral to the foramen magnum.
  • Medial drilling (20°) towards the basion under fluoroscopy with hypoglossal EMG monitoring.
  • Placement of a 34-mm lag screw, confirmed by intraoperative CT.

Main Results:

  • Condylar screws provide dependable fixation in CCF.
  • The described surgical technique allows for precise screw placement.
  • Intraoperative confirmation via CT ensures accurate positioning.

Conclusions:

  • Condylar screws offer reliable fixation for craniocervical fusion.
  • They serve as a beneficial adjunct to established CCF techniques.
  • This method enhances surgical options for complex spinal fusion cases.