The periosteum, endosteum, and Haversian canals tend to be the resources of pluripotent mesenchymal stem cells that initiate the formation with the healing tissues. The bridging callus viewed on radiographs predominantly occurs in the periosteum. The process of healing is different based on the configuration from the fracture fragments and https://www.theorthopaedicandpainpractice.com/what-is-a-long-bone-fracture/