Regression of a symptomatic thoracic disc her-niation with a calcified intervertebral
In the surgical treatment of multilevel cervical spondylotic myelopathy, PEEK cages are superior to titanium cages in maintaining cervical lordosis and intervertebral
height, resulting in good clinical results.23 In our study we tried to compare the results of ACDF procedure with titanium and PEEK cages.
However, these approaches bring limited benefits because they cannot restore full function of the intervertebral
discs they replace.
No postoperative infection of intervertebral
space, dural tear, or abdominal organ injury was recorded in both groups.
When 12 levels in 195 cases were taken into consideration, disc bulging/herniation were determined in 412 (18%) levels among the total of 2,340 intervertebral
Key words: Cancellous bone, injury, intervertebral
disc, inflammation, osteocytes, vertebra.
Inappropriate or excessive compressive force stimulus applied to intervertebral
discs (IVDs) is an important contributing factor in the progress of disc degeneration.
A recent study confirmed that compressive stress caused the change of cytoskeletal structure, function, and extracellular inflammatory mediators of nucleus pulposus through the changes in fluid shear stress inside the nucleus pulposus, thereby leading to intervertebral
disc degeneration .
MRI of L4-L5 showed a degenerative change of intervertebral
disc, severe bilateral foraminal stenosis, and moderate central stenosis.
Thus, we started from marking the extreme contact points between the body and the disk, represented by the most protruding vertebral points in the direction of the intervertebral
disk, a, b, c, d, as well as the half distances a-b and c-d, respectively, which distances represent the anterior-posterior maximum diameters of adjacent vertebrae.