Scanning electron microscopic observation of the ossification of the spinal ligament.

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According to SEM observation of the ligmantum flavum with no other ossifications in roentgenograms, elastic fibers formed a dense and regular pattern with interconnecting micro-fibrils. On the observation of the attachments with age changes, an unusual observation was of osteocyte lacunae, probably corresponding to chondrocytes or osteoblasts. The level reached by the mineralization plane of them was oblique to the surface, being perpendicular to the long axis of the elastic fibers. And this suggests that functional pull on the fibers affects the mineralization process in some way.Observation of the ossification fo the thoracic ligamentum flavum showed degenerative changes of fibers, followed by the appearance of numerous osteocyte lacunae with granular substance. And finaly there appeared osteocytes, resulting in the enchondral ossification.
西日本整形・災害外科学会の論文