Posterior Lumbar Fixation
Posterior Lumbar Fixation - Related Videos
08:53
Whole Animal Perfusion Fixation for Rodents
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Cited by 531 •
2012
Here we describe a low-cost, rapid, controlled and uniform fixation procedure using 4% paraformaldehyde perfused via the vascular system: through the heart of the rat to obtain the best possible preservation of the brain.
04:36
Surgical Induction of Lumbar Spine Instability in Mouse Model: A Surgical Procedure for the Resection of the Lumbar Spinous Processes and Connected Ligaments in Murine Model
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2025
In this video, we describe the surgical procedure to induce lumbar spine instability in a mouse model by resecting the Lumbar L3 to L5 spinous process along with supraspinous and interspinous ligaments.
03:02
Intrathecal Placement of Lumbar Drain: A Technique to Withdraw Cerebrospinal Fluid from the Lumbar Spine in Porcine Model
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2025
This video describes the technique of intrathecal placement of a lumbar drain in a porcine ischemic model, which helps in draining the cerebrospinal fluid to a drainage system. The cerebrospinal fluid pressure is monitored by the drainage system, and fluid is drained to maintain a constant cerebrospinal fluid pressure.
01:03
Fixation and Sectioning
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2023
Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens. The simplest type of preparation is the wet mount, in which the specimen is placed in a drop of liquid on the slide. A liquid specimen can be directly deposited on the slide using a dropper. Solid specimens, such as skin scraping, can be placed on the slide before adding a drop of liquid to prepare the wet mount. Sometimes the liquid is simply water, but stains are often added...
07:25
Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury
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Cited by 18 •
2017
Intervertebral disc degeneration is a significant contributor to back pain and a leading cause of disability worldwide. Numerous animal models of intervertebral disc degeneration exist. We demonstrate an ovine model of intervertebral disc degeneration, utilizing a drill bit, which achieves a consistent disc injury and reproducible level of disc degeneration.
FAQs
Pedicle screws anchor the construct in selected lumbar vertebrae, while rods connect those anchors into a stabilizing framework. This arrangement limits excessive movement between the treated segments, allowing the spine to maintain alignment while bone healing or spinal fusion occurs. The mechanical support is therefore temporary or supportive of biological healing rather than a replacement for that healing process.
Restricting excessive motion helps preserve spinal alignment during treatment of instability, fractures, deformities, or degenerative conditions. Maintaining that alignment can support the protection of neural structures that may otherwise be compromised by spinal pathology. In neuroscience research, the construct also offers a way to examine how altered spinal mechanics affect the spinal cord and nerve roots.
Construct performance depends on how the implants are positioned within selected vertebrae and how effectively the connected rods restrict unwanted motion. These relationships determine the mechanical support available during healing or fusion. Research can evaluate such effects alongside implant design, because changes in fixation mechanics may influence spinal alignment, neural loading, surgical outcomes, and rehabilitation strategies.
The procedure uses a posterior surgical approach to place implants in the lumbar spine. Surgeons typically anchor pedicle screws into selected vertebrae and connect them with rods, creating a framework that limits excessive motion. The construct then supports alignment while healing or spinal fusion progresses. The exact vertebrae selected depend on the instability, fracture, deformity, or degenerative condition being treated.
This technique may be considered when lumbar instability, a vertebral fracture, spinal deformity, or a degenerative condition produces pain or threatens neural structures. Its purpose is to provide mechanical stabilization and support alignment while the underlying bone healing or fusion occurs. Thus, its use relates both to the spinal condition and to the need for controlled motion during recovery.
Researchers use the fixation framework to study the mechanical effects of spinal stabilization on the spinal cord and nerve roots. They can also evaluate surgical outcomes, investigate how implant design affects support, and examine rehabilitation strategies after stabilization. These applications connect structural changes in the lumbar spine with neural protection, recovery, and the functional consequences of altered spinal mechanics.