摘要
Following fracture of left tibia in 14 Wistar rats the mitosis and proliferation of various cellular components in callus tissues were studied with ~3H-Thymidine labelling and radioautographic technique. There was accumulation of silver grains over the nuclei of mesenchymal cells ,endothelial cells of capillaries, fibroblasts and chondrocytes as a result of mitosis and incorporation of the labelling isotopes. Although the osteoblasts and osteocytes could not divide they derived from the mesenchymal cells and osteogenic cells, thus showing silver grains as well. Besides, fat cells and muscle cells likewise revealed silver grains signifying that in fracture healing a number of connective tissue cells underwent mitosis and proliferation.
Following fracture of left tibia in 14 Wistar rats the mitosis and proliferation of various cellular components in callus tissues were studied with ~3H-Thymidine labelling and radioautographic technique. There was accumulation of silver grains over the nuclei of mesenchymal cells ,endothelial cells of capillaries, fibroblasts and chondrocytes as a result of mitosis and incorporation of the labelling isotopes. Although the osteoblasts and osteocytes could not divide they derived from the mesenchymal cells and osteogenic cells, thus showing silver grains as well. Besides, fat cells and muscle cells likewise revealed silver grains signifying that in fracture healing a number of connective tissue cells underwent mitosis and proliferation.
