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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...
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...
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...
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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Related Experiment Video

Updated: Jun 17, 2026

Surgical Technique for the Implantation of a Biomimetic Artificial Intervertebral Disc in a Goat Animal Model
07:06

Surgical Technique for the Implantation of a Biomimetic Artificial Intervertebral Disc in a Goat Animal Model

Published on: October 10, 2025

Mechanical design criteria for intervertebral disc tissue engineering.

Nandan L Nerurkar1, Dawn M Elliott, Robert L Mauck

  • 1McKay Orthopaedic Research Laboratory, University of Pennsylvania, 424 Stemmler Hall, 36th Street and Hamilton Walk, Philadelphia, PA 19104, USA.

Journal of Biomechanics
|January 19, 2010
PubMed
Summary
This summary is machine-generated.

Establishing functional benchmarks is crucial for advancing intervertebral disc tissue engineering. This review proposes native tissue mechanical benchmarks to guide the development of engineered disc replacements for improved clinical outcomes.

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An In Vitro Organ Culture Model of the Murine Intervertebral Disc
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Related Experiment Videos

Last Updated: Jun 17, 2026

Surgical Technique for the Implantation of a Biomimetic Artificial Intervertebral Disc in a Goat Animal Model
07:06

Surgical Technique for the Implantation of a Biomimetic Artificial Intervertebral Disc in a Goat Animal Model

Published on: October 10, 2025

A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
05:46

A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.

Published on: February 14, 2021

An In Vitro Organ Culture Model of the Murine Intervertebral Disc
08:03

An In Vitro Organ Culture Model of the Murine Intervertebral Disc

Published on: April 11, 2017

Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Orthopedics

Background:

  • Current clinical treatments cannot restore function to degenerated intervertebral discs.
  • Intervertebral disc tissue engineering shows promise but lacks defined functional benchmarks for clinical translation.
  • Replicating the complex mechanical behaviors of the intervertebral disc is essential for successful replacement.

Purpose of the Study:

  • To discuss key functional signatures of the intervertebral disc.
  • To propose native tissue mechanical benchmarks for guiding engineered disc development.
  • To compare engineered tissues against native tissue benchmarks.

Main Methods:

  • Review of existing literature on intervertebral disc mechanics.
  • Identification of key functional signatures under tensile, compressive, and shear deformations.
  • Comparison of native tissue mechanical properties with those of engineered disc tissues.

Main Results:

  • Proposed functional benchmarks for intervertebral disc tissue engineering based on native tissue mechanics.
  • Identified specific mechanical measures not yet characterized in native tissues.
  • Highlighted areas where engineered disc tissues have achieved functional equivalence and areas needing further advancement.

Conclusions:

  • Well-defined mechanical benchmarks are critical for advancing intervertebral disc tissue engineering.
  • Native tissue mechanical properties provide essential targets for engineered disc replacements.
  • Further research is needed to achieve full functional equivalence in engineered intervertebral discs.