What kind of force causes an impacted fracture?

• A. Compression from a direct blow.
• B. Pulling apart of the bone.
• C. Fall from a height directed up the long axis.
• D. Twisting motion while the bone is stabilized.

Answer: (C)

An impacted fracture occurs when the bone is compressed due to a force that drives one fragment of bone into another, typically happening during significant falls or high-energy impacts. The correct choice describes a scenario where a fall from a height can direct forces along the long axis of the bone, leading to this type of injury.

This downward force can create a situation where the bone's ends are driven into each other, causing the impacted fracture. Such fractures are most commonly seen in the long bones of the body, such as the femur or humerus, where the vertical alignment and the nature of the fall contribute to the compression that results in the fracture. Understanding the dynamics of forces acting on the bone is crucial for both diagnosis and treatment in athletic training.