Abstract
To clarify the mechanism of calcification during new bone formation induced by demineralized bone matrix gelatin (BMG), BMG was implanted into the skeletal muscle of Sprague-Dawley (SD) rats and histological changes were examined 1,2,3,5,7 and 10 days later. From day 2 after implantation, calcification was observed in muscle fibres near the implanted BMG. Calcification of the BMG ('acellular mineral deposition') was first seen on day 3 and in both, calcification increased. The calcification of muscle fibre was first seen in the sarcoplasmic reticulum (SR) and then in mitochondria or lipid droplet-like structures of satellite cells. The muscle mineral deposition occurred without osteogenic cells and matrix vesicles in the same way as 'acellular mineral deposition'.
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