Related Experiment Video
Updated: Jul 21, 2026
00:10
Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
6.5K
Structural modification and biomechanical analysis of lumbar disc prosthesis: A finite element study
Haibo Ke1, Yuan Guo1, Xushu Zhang1
1College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
Clinical Biomechanics (Bristol, Avon)
|May 31, 2024
Summary
New artificial lumbar disc prostheses, Movcore and Mcopro, were developed. The Mcopro design significantly reduced operative level mobility and facet joint stress, offering improved biomechanical performance for spinal fusion alternatives.
Area of Science:
- Spine biomechanics
- Biomaterials engineering
- Orthopedic surgery
Background:
- Traditional ball-in-socket artificial lumbar discs often lead to increased hypermobility and facet joint overloading.
- Addressing these limitations is crucial for improving outcomes in total disc replacement surgery.
Purpose of the Study:
- To develop and evaluate novel intervertebral disc prostheses, Movcore and Mcopro, with potentially improved biomechanical properties.
- To assess the impact of these new designs on lumbar spine mobility and facet joint stress using a finite element model.
Main Methods:
- A validated finite element model of the L1-L5 lumbar spine was created.
- The existing Mobidisc prosthesis structure was modified to create the Movcore and Mcopro designs.
- Biomechanical properties were analyzed after simulating total disc replacement at the L3/L4 level.
Main Results:
- Implantation of both prostheses increased operative level mobility and peak stress.
- The Mcopro prosthesis demonstrated progressive reductions in mobility and facet joint stress with increased artificial annulus stiffness.
- The Mcopro50 model exhibited mobility closest to the intact spine across various motion planes.
Conclusions:
- The Movcore and Mcopro intervertebral disc prostheses are feasible.
- The Mcopro prosthesis, featuring an artificial annulus, significantly reduces operative level mobility and facet joint stress, indicating enhanced biomechanical performance.
Related Concept Videos
01:29Herniated Intervertebral Disc l: Introduction
Intervertebral disc herniation refers to the displacement of the nucleus pulposus (the gel-like inner core of the disc) through a tear or weakened area in the annulus fibrosus (the outer fibrous ring). The displaced disc material extends beyond the normal boundaries of the disc space and may compress or irritate nearby spinal nerve roots or, less commonly, the spinal cord.Etiology and Risk FactorsHerniation commonly results from degeneration, in which aging reduces disc hydration and...
01:27Degenerative Disc Disease I: Introduction
Degenerative disc disease is a chronic condition in which intervertebral discs gradually lose structure and function. It is not infectious or autoimmune; rather, it results from age-related biochemical and mechanical changes, influenced by genetic, metabolic, and environmental factors.Structure and Function of DiscsThe spine contains 23 intervertebral discs that absorb load, distribute forces, maintain spacing, and allow flexibility. Each disc consists of a nucleus pulposus, a gel-like core...
01:23Degenerative Disc Disease ll: Pathophysiology
The symptoms of degenerative disc disease arise from a combination of mechanical compression, vascular compromise, and biochemical inflammation, which together disrupt nerve function and produce pain.Mechanical CompressionDisc degeneration reduces height and elasticity, predisposing to herniation of the nucleus pulposus, a major cause of radicular pain. Herniations may be protrusion (bulging with intact annulus), extrusion (nucleus extends beyond disc but remains connected), or sequestration...