Etiology: There are three main causes of fracture: direct violence: violence directly acts on a certain part of the bone and causes fractures in the injured part, often accompanied by different degrees of soft tissue injury. If the wheel hits the lower leg, the tibia and fibula will break at the impact.
Indirect violence: In the case of indirect violence, fractures occur at a distance through longitudinal conduction, leverage or torsion. For example, when the foot falls from a height and touches the ground, the trunk bends forward sharply due to gravity, and the vertebral body at the junction of thoracolumbar vertebrae is compressed or burst.
Cumulative strain: long-term, repeated and slight direct or indirect injury, which can lead to fractures in specific parts of limbs, also known as fatigue fractures. For example, long-distance walking can easily lead to fractures of the second and third metatarsals and fibular shaft 1/3.
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