The periosteum, endosteum, and Haversian canals will be the sources of pluripotent mesenchymal stem cells that initiate the development with the healing tissues. The bridging callus viewed on radiographs mainly arises within the periosteum. All individuals aged > sixty many years who ended up admitted towards the Division of Orthopaedics, https://www.theorthopaedicandpainpractice.com/what-is-a-long-bone-fracture/