The internal callus forms within the fractured bone and consists of woven bone tissue that helps stabilize the fracture site. The external callus forms on the surface of the bone and is made up of cartilage and bone tissue that helps provide additional structural support to the healing bone.
Over time, the internal callus is reabsorbed and replaced by new bone tissue, while the external callus is eventually remodeled into stronger bone. These calluses help to properly realign the bones and support the healing process, allowing the fracture to heal and the bone to regain its strength and function.
An internal callus and outer callus are formed on a bone fracture to assist the healing process.
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