[Relief characteristics of the trabecular surface of the substantia spongiosa of human vertebrae].

By means of the scanning electron microscopy relief peculiarities of the trabecular surface in the spongy substance of the lumbar vertebra bodies have been studied in mature males in 6 topographically different zones. Some definite differences have been revealed in structure of the fibrillar carcass of the trabeculae which are connected with their from and localization. The surface of the tubular structures is formed by compact and often anastomosing fasciculi of collagenous fibres oriented in parallel to their long axes. A similar structure is noted in the relief of thick lamellae situating in zones adjoining the compact substance layer. The relief of fine lamellar structures localizing as a rule, in central zones of the vertebra body, is characterized by a less pronounced orientation of collagenous fibre fasciculi and a more often occurring erosive lacunae and areas of an active osteogenesis. A conclusion is made on a certain effect of mechanical loadings on the superficial relief of the trabeculae having various localization.