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Spondylosis Deformans by J. P. Morgan and D. N. Biery

Source: www.ivis.org
Topic: Spondylarthritis
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Sort Desciption: Textbook of Small Animal Orthopaedics. Spondylosis deformans is a generalized disease of aging that is secondary to the degeneration of intervertebral disks that affects the vertebral bodies of all animals. ...

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Spondylosis deformans is a generalized disease of aging that is secondary to the degeneration of intervertebral disks that affects the vertebral bodies of all animals. It is characterized by the formation of bony spurs or, less commonly, complete bony bridges around the diseased disk and thus reestablishes stability to the weakened amphiarthrodial joint. The rate and type of the disk degeneration therefore effect the occurrence of spondylosis deformans. It should be noted that the spurs do not originate from the end-plate but arise from the circumference of the end-plate and are thus periarticular in nature. The formation of the osteophytes in spondylosis deformans is without clinical signs. However, as the spurs create pressure on exiting spinal nerve roots, the possibility of resulting neurologic deficit must be considered. While the osteophytes typically do not project into the spinal canal, this possibility with its resulting cord pressure must also be recognized. Instability of the intervertebral disks may result from other conditions, including congenital vertebral deformities, following disk surgery, following trauma, and following disk or vertebral body infection. The vertebral spurs that form around these individually injured or weakened disks are better considered separately and are not included within the generalized condition of spondylosis deformans. Histologic changes within the developing bony spurs are identical, however, regardless of the etiology. Much of the information that follows in the sections Review of the ...

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