EVERYDAY SCIENCE

Detailed explanation-1: -Other cells that come to the area during this stage form a hematoma (blood clot) around the broken bone. This is the first bridge between the pieces of the broken bone.

Detailed explanation-2: -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-3: -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-4: -Bruising or subgaleal hematoma was common at the site of skull fracture, seen in 43.3% of patients with skull fractures.

Detailed explanation-5: -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.