Sagittal Adjusting Screw

A sagittal adjusting screw is a threaded mechanical component that fine-tunes front-to-back alignment or position within a medical instrument or fixation system. When rotated, its threads convert angular motion into controlled linear displacement, allowing incremental adjustment along the sagittal plane while supporting stable positioning. This component is used where precise anteroposterior alignment is important, including surgical positioning devices, orthopedic systems, and specialized medical hardware. Understanding its function helps clinicians and engineers interpret adjustment mechanisms, improve procedural accuracy, and maintain reproducible alignment during treatment or device setup.

Sagittal Adjusting Screw - Related Videos

Research

JoVE Journal - Medicine

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

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2024

The sagittal adjusting screw (SAS) system has been widely used for thoracolumbar (TL) spinal trauma. Percutaneous options and specialized trauma reduction devices are also available for the SAS system. We describe a technique for reducing TL burst fractures using an SAS system and a newly introduced trauma reduction device.

Establishment of a Modified Ferric Chloride-Induced Superior Sagittal Sinus Thrombosis

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2025

This study presents a protocol for establishing a reproducible, minimally invasive rat model of superior sagittal sinus thrombosis induced by ferric chloride, utilizing a silk-suture method in combination with laser speckle contrast imaging and high-resolution ultrasound for evaluation.

Education

JoVE Core - Mechanical Engineering

Screw: Problem Solving

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2023

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...

Self-Locking Screw

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2023

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. This occurs when the frictional force direction reverses, and the reaction force acts on the other side of the...

Research

JoVE Journal - Medicine
Free Sample

A Simple Guide Screw Method for Intracranial Xenograft Studies in Mice

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Cited by 14 •

2011

In order to evaluate novel therapeutic paradigms for the treatment of glioma, physiological relevant models are essential. We utilize an implantable guide screw procedure for establishment of intracranial xenograft models that is more rapid and safer than stereotactic approaches.

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