The periosteum, endosteum, and Haversian canals are definitely the resources of pluripotent mesenchymal stem cells that initiate the development of the healing tissues. The bridging callus witnessed on radiographs mainly occurs within the periosteum. The process of healing is different with regards to the configuration with the fracture fragments and https://www.theorthopaedicandpainpractice.com/what-is-a-long-bone-fracture/