Degenerative joint disease (DJD) is also known as osteoarthritis (OA); when this condition occurs in the spine, it may also be called spondylosis.
Spondylolisthesis is a condition of the spine in which one vertebra slips on the vertebra below it. This condition usually occurs in the lumbar spine.
Osteoarthritis of the Cervical Spine
The causative mechanism of osteoarthritis is excessive physical stress placed on the joint, resulting in cartilage and then bony degeneration.