ANATOMY

Detailed explanation-1: -The blood vessels supplying the bone and periosteum are ruptured during the fracture, causing a hematoma to form around the fracture site. The hematoma clots and forms the temporary frame for subsequent healing.

Detailed explanation-2: -The fracture haematoma becomes organised and is then infiltrated by fibrovascular tissue, which forms a matrix for bone formation and primary callus. Reparative phase (duration: days-weeks): A thick mass of callus forms around the bone ends, from the fracture haematoma.

Detailed explanation-3: -Fracture haematoma formation is the first and foremost important stage of fracture healing. It orchestrates the inflammatory and cellular processes leading to the formation of callus and the restoration of the continuity of the bone.

Detailed explanation-4: -The new bone starts to form when the hematoma is replaced by a soft callus, with new blood vessels inside. Fibers and cartilage are involved in the formation of this soft link between fragments of broken bone.