SPATIAL ORGANIZATION OF BONE TISSUE IN DISTRACTION REGENERATES ACCORDING TO SCANNING ELECTRON MICROSCOPY DAT

Abstract

Peculiarities of spatial organization of bone tissue in distraction regenerates of adult dogs at different stages of leg elongation are studied, using scanning electron microscopy. It is established, that regenerating bone tissue acquires a microspongioid structure with formation of closed spheroid lacunae in the parts, adjacent to fragmental ends in the medullary canal of the proximal and distal fragments of elongated bone and in distraction diastasis. Round and closed bone lacunae under the influence of distraction are transformed to longitudinally oriented primary cylinder-shaped osteones in peripheral parts of undermineralized median interlayer proximally and distally. Tops of osteones grow towards each other from the direction of the proximal and distal bone fragments all over the period of distraction. Besides, the regenerates acquire typical zonal structure.