These changes can result in weaker and thinner cartilage. Because both the discs and the joints (facet joints) are composed of cartilage, these areas are subject to wear and tear over time (degenerative changes). This gradual deterioration of the discs between the vertebrae (back bones) is referred to as degenerative disc disease.
These changes usually occur long before you can see them on X-rays or other imaging techniques.
What happens? There is a progression of the wear and tear on the discs and causing the weakening of protein (the collagen) of the outer band of the disc (annulus fibrosis) which then causes a structural and biomechanical change of the disc. Furthermore, water and proteoglycan (PG) content decreases. PGs are molecules that behave like super sponges and can bind and attract water hundreds of times their own molecular weight. “Disc desiccation” is a term used to describe the proteoglycan content decreasing and loss of water in the discs (dehydration). You may find this term on your MRI report.
This process severely affects the "shock absorbing" properties of the discs as they "compress" under normal pressure. These changes usually occur at the same time as the annulus fibrosis degenerates and generally leads to the disc’s inability to handle mechanical stress. Because the lumbar spine carries a large portion of the body’s weight, degeneration of the disc tissue makes the disc more susceptible to herniate and can cause local pain in the affected area. Disc degeneration can sometimes lead to disorders such as spinal stenosis (narrowing of the spinal canal), spondylolisthesis (forward slippage of the disc and vertebra), and retrolisthesis (backward slippage of the disc and vertebra).
LUMBAR DEGENERATIVE DISC DISEASE PAIN AND SYMPTOMS
Although symptoms are variable from person to person, most patients with lumbar degenerative disc disease will experience low-grade continuous but tolerable pain that will occasionally flare (intensify) for a few days or more. Pain symptoms can vary, but generally are:
- Centered on the lower back, although it can radiate to the hips and legs
- Frequently worse when sitting, as the discs experience a heavier load than when patients are standing, walking or even lying down.
- Exacerbated by certain movements, particularly bending or twisting.
Although degenerative disc disease is relatively common in aging adults, it seldom requires surgery. When medical attention is warranted, the majority of patients respond well to non-operative forms of treatment like chiropractic manipulative therapy, physical therapy, or Non-Surgical Spinal Decompression therapy. |
