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Related Concept Videos

Degenerative Disc Disease I: Introduction01:27

Degenerative 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...
Degenerative Disc Disease ll: Pathophysiology01:23

Degenerative 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...
Herniated Intervertebral Disc l: Introduction01:29

Herniated 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...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

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Surgical Technique for the Implantation of a Biomimetic Artificial Intervertebral Disc in a Goat Animal Model
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Intervertebral disc properties: challenges for biodevices.

John J Costi1, Brian J C Freeman, Dawn M Elliott

  • 1School of Computer Science, Engineering & Mathematics, Faculty of Science & Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia. john.costi@flinders.edu.au

Expert Review of Medical Devices
|May 6, 2011
PubMed
Summary
This summary is machine-generated.

Intervertebral disc biodevices aim to preserve motion but may not reduce adjacent-level degeneration. Future biological treatments offer promise for disc regeneration and repair.

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Area of Science:

  • Biomedical Engineering
  • Orthopedic Surgery
  • Spine Research

Background:

  • Motion-preserving intervertebral disc biodevices (e.g., total disc replacement) are available or in development.
  • Long-term performance data and randomized controlled trials for these devices are limited.
  • Current biodevices restore some motion segment function but haven't demonstrably reduced adjacent-level degeneration.

Purpose of the Study:

  • To review current intervertebral disc biodevices, including interbody cages, nucleus replacements, and posterior dynamic stabilization devices.
  • To discuss the biomechanical challenges in replicating natural disc function.
  • To explore future biological treatments for disc regeneration and repair.

Main Methods:

  • Literature review of existing and developing intervertebral disc biodevices.
  • Discussion of biomechanical properties of the intervertebral disc.
  • Analysis of surgical treatments for low back pain, focusing on lumbar total disc replacement.
  • Exploration of emerging biological strategies for disc tissue regeneration.

Main Results:

  • Despite restoring motion segment function, current biodevices have not reduced the risk of adjacent-level degeneration.
  • Replicating the complex biomechanical function of the disc remains a significant short-term challenge.
  • Biological strategies present long-term opportunities for disc repair and regeneration.

Conclusions:

  • Rigorous assessment and responsible introduction of new disc replacement technologies are crucial.
  • The next generation of disc biodevices must address biomechanical complexity and longevity for active patients.
  • Biological treatments hold significant future potential for treating intervertebral disc degeneration.