Degenerative Disc Disease - by Kim Wise.

The histogenesis of bone which is the differentiation of cells into specialized tissues and organs during growth; is a fascinating study on its own merit in the understanding of disease phenomena of bone such as in spinal stenosis.

Primarily bone growth is dependent upon the mechanical forces applied to it as well the chemistry surrounding the cells. Making Haversian Systems throughout the bone by depositing bone in lines perpendicular to the forces applied to it in concentric rings like the rings of a tree in a transverse section. This architecture gives the bone strength.

In spinal stenosis, the bone growth and deposits of calcium are equally a result of the forces applied to central aspects of the adjacent vertebra, ligamentum flavum, discs and apophyseal joints. The resultant pressure on bone is from the poor neuromuscular organisation of the whole system. More common in the aged population because it is the end point of this long-standing degenerative disc disease. Spinal stenosis is NOT a result of age but of poor FUNCTION over many years.

Spinal Stenosis is more common in cervical and lumbar curves; the Primary curves. If we can decrease compressive forces especially in these