Annulus fibrosis


Also found in: Acronyms.

Annulus fibrosis

The outer portion of the intervertebral disk made primarily of fibrocartilage rings.
Mentioned in: Herniated Disk
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References in periodicals archive ?
01); annulus fibrosis ADC values of L1 intervertebral discs in Groups A (0.
10],[11] Proteoglycan aggregates in adult human nucleus pulposus are mainly distributed within the extracellular matrix, while those of the annulus fibrosis are mainly distributed between collagen fibers.
The Pfirrmann grading system, closely related to signal strengths of nucleus pulposus and annulus fibrosis, is widely used in the clinical evaluation of IDD.
8) They are not due to calcification of the anterior longitudinal ligament but rather ossification of the anterior portion of the annulus fibrosis of the intervertebral disc.
And they develop cracks or small tears in the outer layer, the annulus fibrosis, which can cause the inner layer, the nucleus pulposus, to be forced out, resulting in a bulging, herniated, or even ruptured disc.
2] But as the osteoblastosis progressively infiltrates the annulus fibrosis of each veretebral disk and ossifies it, as well as the surrounding soft-tissue attachments, the articulation of the apophyses is hindered and they, too, fuse.
We performed nucleoplasty in nine patients with a full-thickness tear in the annulus fibrosis, and at the last follow-up three of these patients (33.