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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...

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Related Experiment Video

Updated: Jul 12, 2026

Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury
07:25

Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury

Published on: May 25, 2017

Does lumbar facet arthrosis precede disc degeneration? A postmortem study.

Jason David Eubanks1, Michael J Lee, Ezequiel Cassinelli

  • 1Department of Orthopaedics, Case Western Reserve University, Cleveland, OH, USA. Jdeubanks2002@yahoo.com

Clinical Orthopaedics and Related Research
|September 4, 2007
PubMed
Summary

Facet degeneration, measured by osteophytosis, appears early in lumbar spines, preceding disc degeneration. However, disc degeneration overtakes facet degeneration in older individuals.

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Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
06:22

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration

Published on: July 8, 2021

Related Experiment Videos

Last Updated: Jul 12, 2026

Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury
07:25

Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury

Published on: May 25, 2017

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
06:22

Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration

Published on: July 8, 2021

Area of Science:

  • Orthopedics and Spine Research
  • Skeletal Degenerative Disease Analysis
  • Biomechanical Aging Studies

Background:

  • The conventional understanding posits lumbar disc degeneration initiates spinal instability and subsequent facet joint arthrosis.
  • This study investigates the alternative hypothesis that facet joint degeneration may precede intervertebral disc degeneration.

Purpose of the Study:

  • To examine the temporal relationship between facet degeneration and intervertebral disc degeneration in the lumbar spine.
  • To determine if facet osteophytosis precedes vertebral rim osteophytosis across different age groups.

Main Methods:

  • Analysis of 647 skeletal lumbar spines to assess degenerative changes.
  • Quantification of facet osteophytosis and vertebral rim osteophytosis using a 0-4 grading scale.
  • Stratification of data by age groups (under 30, 30-39, over 40) to identify age-related patterns.

Main Results:

  • Younger specimens (<30 years) exhibited higher facet osteophytosis prevalence than vertebral rim osteophytosis at L1-L2 and L2-L3.
  • Individuals aged 30-39 showed greater facet osteophytosis than vertebral rim osteophytosis at L4-L5.
  • Older specimens (>40 years) displayed more vertebral rim osteophytosis than facet osteophytosis at most levels, except L4-L5 and L5-S1.

Conclusions:

  • Facet osteophytosis is an early indicator in the lumbar degenerative cascade, often preceding vertebral rim osteophytosis.
  • While facet degeneration occurs early, vertebral rim osteophytosis progresses more rapidly in later life, eventually surpassing facet degeneration.
  • These findings challenge the traditional view, suggesting a more complex interplay in lumbar spinal degeneration over time.