Three-Dimensional Architecture of Lumbar Intervertebral Discs

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Abstract
Three-dimensional observation of the collagen framework of [human] lumbar intervertebral discs by scanning electron microscopy confirmed that the fibrillar framework of the annulus and the cartilage end-plate encircle the nucleus as a closed pack system. Cartilage end-plate was made of dense collagen framework aligned horizontally. There was no interconnection between the cartilage end-plate and the lamellar subchondral collagen. In palces, vascular channels ran directly at the end-plate. In the inner 1/3 of the annulus, obliquely oriented fibrillar lamellae interconnected with the cartilage end-plate. In the outer 2/3 the fibrillar lamellae were formed from fibrillar bundles and were firmly anchored into the vertebral bodies. Architectural relationships between the disc and the vertebral bodies are discussed.

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