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Updated: Jan 25, 2026
06:22
Optical Sectioning and Visualization of the Intervertebral Disc from Embryonic Development to Degeneration
Published on: July 8, 2021
2.6K
Associations Between Intervertebral Disc Degeneration Grading Schemes and Measures of Disc Function.
Uruj Zehra1, Natasha Noel-Barker2, John Marshall2
1Department of Anatomy, University of Health Sciences, Lahore, Pakistan.
Summary
Degeneration grading systems correlate with altered disc biomechanics, not just tissue changes. These assessments better predict mechanical dysfunction than age or spinal level.
Area of Science:
- Orthopedics
- Biomechanics
- Spinal Health
Background:
- Disc degeneration is a primary cause of spinal dysfunction and pain.
- Current grading systems focus on tissue changes, neglecting functional alterations.
Purpose of the Study:
- To compare existing disc degeneration grading systems.
- To evaluate their correlation with biomechanical measures of disc function.
Main Methods:
- Sixty-six human spinal motion segments (T8-S1) from cadavers (48-98 years) were analyzed.
- Disc degeneration was graded using radiographic, macroscopic, and microscopic evaluations.
- Intervertebral disc pressure (IDP) and annulus stresses were measured under compression.
Main Results:
- Macroscopic and microscopic grading strongly correlated with each other but weakly with radiographic features.
- Both IDP and annulus stresses decreased with increasing degeneration scores across all grading methods.
- Degeneration scores increased with age and lower spinal levels, but functional measures correlated more strongly with degeneration than these factors.
Conclusions:
- Radiographic and tissue-based disc degeneration assessments are reliable and correlate with each other.
- These grading systems are more closely linked to mechanical (dys)function than to patient age or spinal level.
- Current grading systems can be improved by incorporating functional biomechanical assessments.
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