Disc Herniation Mechanism

Disc Herniation Mechanism

Background

Computer simulation programs provide researchers with cost-effective methodologies for studying internal stresses and loads on biological specimens. Previous researchers have studied the mechanisms required to traumatically induce a disc herniation in cadaveric spines. However, there are no known studies that utilize computer simulation programs to study the mechanisms of disc herniation in the spine. Therefore, engineers at Explico have developed a three-dimensional finite element model of the lumbar spine with the purpose of predicting disc herniation mechanics.          

Approach

A three-dimensional finite element model of the lumbar spine was built based on CT scan data of a cadaveric specimen. The model was validated under a variety of conditions to ensure the models biofidelity. The validated model was altered so that the boundary conditions mimicked the boundary conditions performed by previous researchers on cadaveric specimens. The model was loaded under varying amounts and combinations of compression and flexion. Disc stresses and loads most consistent with herniation risk were evaluated. We hypothesized that the disc would experience the greatest magnitudes of nucleus extrusion force and posterior annulus stress when the model was exposed to a combination of compression and flexion.

Takeaway

Results of the study confirmed our hypothesis and demonstrated that Explico’s model accurately predicted the greatest disc herniation risk under loading mechanisms consistent with the scientific literature. Specifically, the disc experienced the greatest magnitudes of nuclear extrusion force and posterior annular stress when the model was loaded with high compression while in its most flexed position. Development and validation of a finite element model that accurately predicts disc herniation mechanics provides Explico’s engineers the tools to further evaluate disc herniation mechanism amongst a variety of conditions.

back to research projects

Related Specialties

Related Research Projects

Read More →
Characterization of Occupant Lower Extremity Behavior During Moderate-to-High Speed Rear Impacts
Injury potential to the neck has been studied extensively for rear-end impacts.
Read More →
Assessment of Closed-Head Injury Risk during Moderately Severe Rear-End Collisions
It has been suggested that closed head injury can occur during low-to-moderate speed rear-end collisions.
Read More →
Disc Herniation Mechanism
Computer simulation programs provide researchers with cost-effective methodologies for studying internal stresses and loads on biological specimens.
Read More →
Pediatric Injury and “Shaken Baby Syndrome”
The objective of the current study was to evaluate pediatric neck and head injury potential during purely inertial loading of the head.
Read More →
Out of Position Analysis of Rear-End Collision Integrating Subject-Specific Posture
Kinetic and kinematic data collected from controlled low-speed rear-end crash tests are typically limited to normally seated volunteers, cadavers, and anthropomorphic test devices.
Read More →
Skull Fracture Origination
Forensic evaluations of fracture patterns arising from blunt force trauma to the human head have traditionally relied upon case studies rather than controlled experimental data.
Read More →
Biomechanical Analysis of Rear-End Collision Integrating Subject-Specific Posture & Vehicle Fit
Available kinematic and kinetic data with respect to low speed rear-end collisions are typically limited to volunteer, cadaver, and anthropomorphic test device.
Read More →
Disparate Patterns of Skull Fracture
Determining the etiology of skull trauma by analyzing the resulting fracture pattern is a common forensic objective that has been demonstrated to follow generalized trends.
Read More →
Hand and Foot Forces in Occupational Railcar Ascent
Falls from ladders are a major cause of worker injuries and fatalities.
Read More →
Visual Acuity and Contrast Sensitivity in a Virtual Environment
Virtual reality (VR) and head-mounted displays (HMDs) can be viable tools for the presentation of accurate and valid demonstrative data in the courtroom.
Read More →
Spatial Awareness and Depth Perception in Various Display Methodologies (e.g. 2D and 360 degree Photos/Videos, and Virtual Reality)
The ability to accurately depict the scene of an incident to a jury is a key element of presenting trial demonstratives.
Read More →
Smartphones and Driver/Pedestrian Distraction
Individuals interact with their smartphones throughout the dar, regardless of the activity they are performing.
Read More →
The Contribution of Posterior Spinal Muscles and Facet Joint Contact in Reducing Disk Herniation Risk
Disc herniations occur in a biomechanical environment consistent with forward bending, i.e. compression and flexion of the spine.
back to research projects
Find the ideal expert today.

Each of our professionals offers a unique set of skills and experience and are ready to discuss your next project.

Find an Expert