电镜观察到,sBMP 5mg小鼠肌肉内植入后3天,间充质细胞在植入区内聚集并可见由此分化而来的中间型细胞;术后7天,软骨细胞及软骨基质形成;术后14天,软骨细胞变隆,骨母细胞及纤维母细胞功能活跃;基质钙化;术后21天,骨母细胞被钙化基质包埋形成骨细胞。sBMP的诱导作用促发了个一完 Electron microscopy showed that 3 days after sBMP 5mg intramuscular implantation, mesenchymal cells gathered in the implanted region and the resulting differentiated intermediate cells; 7 days after the formation of chondrocytes and cartilage matrix; On the 14th day after operation, the chondrocytes became strained, the function of osteoblasts and fibroblasts was active, and matrix calcification. At day 21, the osteoblasts were embedded with calcified matrix to form osteocytes. The induction of sBMP prompted a finish