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The ligamentum flavum (yellow ligament), an important structural component intimately adjacent to the posterior portion of the dural sac (nerve sac) can become thickened and cause stenosis. The articular facets, also in the posterior portion of the bony spine can become thickened and enlarged, causing stenosis.
The ligamenta flava (sg.: ligamentum flavum, Latin for yellow ligament) are a series of ligaments that connect the ventral parts of the laminae of adjacent vertebrae. They help to preserve upright posture, preventing hyperflexion, and ensuring that the vertebral column straightens after flexion. Hypertrophy can cause spinal stenosis.
In this procedure, the ligamentum flavum is first removed, followed by the removal of the superior facet osteophyte in the spinal canal, and then the decompression of the spinal nerve root. [ 5 ] [ 11 ] Another surgical method of decompression is the Fenestration method, which involves creating a small window in the spinal canal and then ...
Other than static imaging processes, a CT scan can also be used for observing changes in spinal canal features before and after a laminotomy. One of the main signs of lumbar spinal stenosis is the thickening of the ligamentum flavum, causing it to expand towards the spinal canal. [2]
Such severe spinal stenosis symptoms are virtually absent in lumbar stenosis, however, as the spinal cord terminates at the top end of the adult lumbar spine, with only nerve roots (cauda equina) continuing further down. [15] Cervical spinal stenosis is a condition involving narrowing of the spinal canal at the level of the neck.
The trial aims to compare the efficacy of TOPS versus TLIF in stabilizing one lumbar level (L2-L5) after decompression in patients with moderate lumbar spinal stenosis and Grade 1 spondylolisthesis, including conditions like thickened ligamentum flavum or scarred facet joints. [27]
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